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runtime: "found pointer to free object" on plan9-arm #46822

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prattmic opened this issue Jun 18, 2021 · 70 comments
Open

runtime: "found pointer to free object" on plan9-arm #46822

prattmic opened this issue Jun 18, 2021 · 70 comments
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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Plan9
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Backlog

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@prattmic
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prattmic commented Jun 18, 2021 •
edited by bcmills 

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`

2021-06-14T22:42:48-7841cb1/plan9-arm
2021-05-28T03:34:02-3de3440/plan9-arm
2021-04-30T18:05:38-4063605/plan9-arm
2021-04-30T17:48:17-95c5f4d/plan9-arm
2021-04-30T12:03:55-06ac303/plan9-arm
2021-04-27T17:03:53-074a49b/plan9-arm
2021-04-26T21:35:26-be28caf/plan9-arm
2021-04-23T01:16:19-cfac62a/plan9-arm
2021-04-16T21:20:31-02a2ff4/plan9-arm
2021-04-06T03:31:26-298975c/plan9-arm
2021-04-05T16:22:17-042f4cb/plan9-arm
2021-04-05T16:22:12-24dd8cf/plan9-arm
2021-03-31T14:10:11-ca3aefc/plan9-arm
2021-03-31T03:51:51-c93cd86/plan9-arm
2021-03-25T02:50:11-a95e2ae/plan9-arm
2021-03-19T19:59:56-3b0d288/plan9-arm
2021-03-17T00:17:33-68f8e1a/plan9-arm
2021-02-08T15:56:59-ed3e4af/plan9-arm
2021-01-11T19:45:02-7593090/plan9-arm
2021-01-08T01:58:34-cab1202/plan9-arm
2020-11-02T21:10:41-ac766e3/plan9-arm
2020-10-29T22:45:29-f588974/plan9-arm

cc @mknyszek
@prattmic prattmic added OS-Plan9 NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. labels Jun 18, 2021
@prattmic prattmic added this to the Backlog milestone Jun 18, 2021
@prattmic prattmic mentioned this issue Jun 18, 2021
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@prattmic
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Similar failures on Solaris in #44902

@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Jul 7, 2022
@gopherbot
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Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2022-12-01 21:30 plan9-arm go@0e8b6056 (log) 
runtime: marked free object in span 0x10af3e40, elemsize=80 freeindex=21 (bad use of unsafe.Pointer? try -d=checkptr)
0x10e3a000 alloc unmarked
0x10e3a050 alloc unmarked
0x10e3a0a0 alloc unmarked
0x10e3a0f0 alloc unmarked
0x10e3a140 alloc unmarked
0x10e3a190 alloc unmarked
0x10e3a1e0 alloc unmarked
0x10e3a230 alloc unmarked
0x10e3a280 alloc unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x51ed22, 0x1c})
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/panic.go:1198 +0x5c
runtime.(*mspan).reportZombies(0x10af3e40)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:691 +0x350
runtime.(*sweepLocked).sweep(0x3ffffb78, 0x0)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:524 +0x834
runtime.(*mcentral).uncacheSpan(0x83e10c, 0x10af3e40)
...
runtime.gcMarkTermination(0x3ff22051096a81bc)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgc.go:1050 +0x7cc fp=0x10c3cf64 sp=0x10c3cdc8 pc=0x1abec
runtime.gcMarkDone()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgc.go:902 +0x258 fp=0x10c3cf8c sp=0x10c3cf64 pc=0x1a2f0
runtime.gcBgMarkWorker()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgc.go:1330 +0x3c4 fp=0x10c3cfec sp=0x10c3cf8c pc=0x1ba94
runtime.goexit()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/asm_arm.s:838 +0x4 fp=0x10c3cfec sp=0x10c3cfec pc=0x65138
created by runtime.gcBgMarkStartWorkers
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgc.go:1124 +0x28
2022-12-08 18:29 plan9-arm go@f368abb4 (log) 
runtime: marked free object in span 0x9d10c4, elemsize=8 freeindex=760 (bad use of unsafe.Pointer? try -d=checkptr)
0x9418000 alloc marked  
0x9418008 alloc marked  
0x9418010 alloc marked  
0x9418018 alloc marked  
0x9418020 alloc marked  
0x9418028 alloc marked  
0x9418030 alloc marked  
0x9418038 alloc marked  
0x9418040 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x609225, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1047 +0x4c fp=0x3ffffb98 sp=0x3ffffb84 pc=0x3ac58
runtime.(*mspan).reportZombies(0x9d10c4)
	/boot/workdir/go/src/runtime/mgcsweep.go:846 +0x35c fp=0x3ffffbd8 sp=0x3ffffb98 pc=0x2a270
runtime.(*sweepLocked).sweep(0x3ffffc6c, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:629 +0x2fc fp=0x3ffffc5c sp=0x3ffffbd8 pc=0x29444
runtime.(*mcentral).uncacheSpan(0x9b2c60, 0x9d10c4)
...
runtime.gcMarkTermination()
	/boot/workdir/go/src/runtime/mgc.go:1108 +0xa6c fp=0x943df4c sp=0x943dd74 pc=0x1b364
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:918 +0x2a4 fp=0x943df80 sp=0x943df4c pc=0x1a7c0
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1407 +0x3f0 fp=0x943dfec sp=0x943df80 pc=0x1c44c
runtime.goexit()
	/boot/workdir/go/src/runtime/asm_arm.s:831 +0x4 fp=0x943dfec sp=0x943dfec pc=0x6b38c
created by runtime.gcBgMarkStartWorkers
	/boot/workdir/go/src/runtime/mgc.go:1199 +0x20
2022-12-09 10:49 plan9-arm go@e76c87b1 (log) 
runtime: marked free object in span 0x10b8c0e0, elemsize=64 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x10f8a000 free  unmarked
0x10f8a040 free  unmarked
0x10f8a080 free  unmarked
0x10f8a0c0 free  unmarked
0x10f8a100 free  unmarked
0x10f8a140 alloc marked  
0x10f8a180 alloc marked  
0x10f8a1c0 free  unmarked
0x10f8a200 free  unmarked
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x51ed22, 0x1c})
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/panic.go:1198 +0x5c fp=0x10c40ee0 sp=0x10c40ecc pc=0x37a74
runtime.(*mspan).reportZombies(0x10b8c0e0)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:691 +0x350 fp=0x10c40f20 sp=0x10c40ee0 pc=0x26b14
runtime.(*sweepLocked).sweep(0x10c40fb4, 0x0)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:524 +0x834 fp=0x10c40f9c sp=0x10c40f20 pc=0x26470
runtime.sweepone()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:290 +0x110 fp=0x10c40fd8 sp=0x10c40f9c pc=0x25914
runtime.bgsweep()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:166 +0x148 fp=0x10c40fec sp=0x10c40fd8 pc=0x25418
runtime.goexit()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/asm_arm.s:838 +0x4 fp=0x10c40fec sp=0x10c40fec pc=0x65138
created by runtime.gcenable
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgc.go:181 +0x60

— watchflakes

@gopherbot
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Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-01-20 05:00 plan9-arm go@3e77efc7 (log) 
runtime: marked free object in span 0x9e3904, elemsize=96 freeindex=33 (bad use of unsafe.Pointer? try -d=checkptr)
0x95c0000 alloc marked  
0x95c0060 alloc marked  
0x95c00c0 alloc marked  
0x95c0120 alloc marked  
0x95c0180 alloc marked  
0x95c01e0 alloc marked  
0x95c0240 alloc marked  
0x95c02a0 alloc marked  
0x95c0300 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x61498f, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1075 +0x4c fp=0x3ffffb48 sp=0x3ffffb34 pc=0x3de18
runtime.(*mspan).reportZombies(0x9e3904)
	/boot/workdir/go/src/runtime/mgcsweep.go:846 +0x35c fp=0x3ffffb88 sp=0x3ffffb48 pc=0x2d270
runtime.(*sweepLocked).sweep(0x3ffffc20, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:634 +0xa10 fp=0x3ffffc10 sp=0x3ffffb88 pc=0x2cb48
runtime.(*mcentral).uncacheSpan(0x9c34f8, 0x9e3904)
...
runtime.(*mcache).prepareForSweep(0x9d8088)
	/boot/workdir/go/src/runtime/mcache.go:328 +0x5c fp=0x3ffffc8c sp=0x3ffffc74 pc=0x17234
runtime.procresize(0x4)
	/boot/workdir/go/src/runtime/proc.go:5011 +0x4dc fp=0x3ffffcf4 sp=0x3ffffc8c pc=0x4bee0
runtime.startTheWorldWithSema(0x0)
	/boot/workdir/go/src/runtime/proc.go:1346 +0xb0 fp=0x3ffffd28 sp=0x3ffffcf4 pc=0x439ec
runtime.gcMarkTermination.func3()
	/boot/workdir/go/src/runtime/mgc.go:1090 +0x20 fp=0x3ffffd38 sp=0x3ffffd28 pc=0x69a44
runtime.systemstack()
	/boot/workdir/go/src/runtime/asm_arm.s:317 +0x60 fp=0x3ffffd3c sp=0x3ffffd38 pc=0x6e74c

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-01-27 17:13 plan9-arm go@c8c646d3 (log) 
runtime: marked free object in span 0x932df78, elemsize=32 freeindex=172 (bad use of unsafe.Pointer? try -d=checkptr)
0x94f6000 alloc marked  
0x94f6020 alloc marked  
0x94f6040 alloc marked  
0x94f6060 alloc marked  
0x94f6080 alloc marked  
0x94f60a0 alloc marked  
0x94f60c0 alloc marked  
0x94f60e0 alloc marked  
0x94f6100 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6098a1, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1075 +0x4c fp=0x3ffffc6c sp=0x3ffffc58 pc=0x3ccac
runtime.(*mspan).reportZombies(0x932df78)
	/boot/workdir/go/src/runtime/mgcsweep.go:846 +0x35c fp=0x3ffffcac sp=0x3ffffc6c pc=0x2c210
runtime.(*sweepLocked).sweep(0x3ffffd44, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:629 +0x304 fp=0x3ffffd34 sp=0x3ffffcac pc=0x2b3dc
runtime.(*mcentral).uncacheSpan(0x9b7108, 0x932df78)
...
runtime.gcMarkTermination()
	/boot/workdir/go/src/runtime/mgc.go:1108 +0xa58 fp=0x986ef4c sp=0x986ed54 pc=0x1d310
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:918 +0x29c fp=0x986ef80 sp=0x986ef4c pc=0x1c780
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1407 +0x3e4 fp=0x986efec sp=0x986ef80 pc=0x1e404
runtime.goexit()
	/boot/workdir/go/src/runtime/asm_arm.s:831 +0x4 fp=0x986efec sp=0x986efec pc=0x6ef3c
created by runtime.gcBgMarkStartWorkers
	/boot/workdir/go/src/runtime/mgc.go:1199 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-02-07 17:11 plan9-arm text@30dadde3 go@9565d990 (log) 
runtime: marked free object in span 0x92f62e8, elemsize=320 freeindex=9 (bad use of unsafe.Pointer? try -d=checkptr)
0x9700000 alloc unmarked
0x9700140 alloc unmarked
0x9700280 alloc unmarked
0x97003c0 alloc unmarked
0x9700500 alloc unmarked
0x9700640 alloc unmarked
0x9700780 alloc unmarked
0x97008c0 alloc unmarked
0x9700a00 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x61e0ec, 0x1c})
	runtime/panic.go:1075 +0x4c fp=0x3ffffbc0 sp=0x3ffffbac pc=0x3cd6c
runtime.(*mspan).reportZombies(0x92f62e8)
	runtime/mgcsweep.go:846 +0x34c fp=0x3ffffbfc sp=0x3ffffbc0 pc=0x2c268
runtime.(*sweepLocked).sweep(0x3ffffc94, 0x0)
	runtime/mgcsweep.go:629 +0x304 fp=0x3ffffc84 sp=0x3ffffbfc pc=0x2b440
runtime.(*mcentral).uncacheSpan(0x9ddba0, 0x92f62e8)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1108 +0xa5c fp=0x9438f4c sp=0x9438d54 pc=0x1d2dc
runtime.gcMarkDone()
	runtime/mgc.go:918 +0x2a4 fp=0x9438f80 sp=0x9438f4c pc=0x1c748
runtime.gcBgMarkWorker()
	runtime/mgc.go:1407 +0x3f0 fp=0x9438fec sp=0x9438f80 pc=0x1e3d4
runtime.goexit()
	runtime/asm_arm.s:831 +0x4 fp=0x9438fec sp=0x9438fec pc=0x6f04c
created by runtime.gcBgMarkStartWorkers
	runtime/mgc.go:1199 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-02-13 20:23 plan9-arm go@790f2505 (log) 
runtime: marked free object in span 0x9377780, elemsize=32 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x98f4000 alloc marked  
0x98f4020 free  marked   zombie
0x098f4020:  0x6f6f622f  0x6f772f74  0x69646b72  0x6f672f72 
0x098f4030:  0x676b702f  0x616c702f  0x615f396e  0x00006d72 <runtime.dumpregs+0x0000046e> 
0x98f4040 alloc marked  
0x98f4060 free  unmarked
0x98f4080 alloc marked  
0x98f40a0 free  unmarked
0x98f40c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x62634a, 0x1c})
	runtime/panic.go:1075 +0x4c fp=0x9440ec8 sp=0x9440eb4 pc=0x3cd6c
runtime.(*mspan).reportZombies(0x9377780)
	runtime/mgcsweep.go:846 +0x34c fp=0x9440f04 sp=0x9440ec8 pc=0x2c268
runtime.(*sweepLocked).sweep(0x9440fa4, 0x0)
	runtime/mgcsweep.go:629 +0x304 fp=0x9440f8c sp=0x9440f04 pc=0x2b440
runtime.sweepone()
	runtime/mgcsweep.go:391 +0x108 fp=0x9440fc8 sp=0x9440f8c pc=0x2ae3c
runtime.bgsweep(0x9430080)
	runtime/mgcsweep.go:299 +0x12c fp=0x9440fe4 sp=0x9440fc8 pc=0x2ab9c
runtime.gcenable.func1()
	runtime/mgc.go:178 +0x28 fp=0x9440fec sp=0x9440fe4 pc=0x1b548
runtime.goexit()
	runtime/asm_arm.s:831 +0x4 fp=0x9440fec sp=0x9440fec pc=0x6f04c
created by runtime.gcenable
	runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-03-06 18:34 plan9-arm go@5a7793b7 (log) 
runtime: marked free object in span 0x93423c8, elemsize=24 freeindex=7 (bad use of unsafe.Pointer? try -d=checkptr)
0x95f6000 alloc marked  
0x95f6018 alloc marked  
0x95f6030 alloc marked  
0x95f6048 alloc marked  
0x95f6060 alloc marked  
0x95f6078 alloc marked  
0x95f6090 alloc marked  
0x95f60a8 alloc marked  
0x95f60c0 free  unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x62b3e3, 0x1c})
	runtime/panic.go:1075 +0x4c fp=0x3ffffd74 sp=0x3ffffd60 pc=0x3bfcc
runtime.(*mspan).reportZombies(0x93423c8)
	runtime/mgcsweep.go:846 +0x34c fp=0x3ffffdb0 sp=0x3ffffd74 pc=0x2b5ec
runtime.(*sweepLocked).sweep(0x3ffffe48, 0x0)
	runtime/mgcsweep.go:634 +0xa14 fp=0x3ffffe38 sp=0x3ffffdb0 pc=0x2aed4
runtime.(*mcentral).uncacheSpan(0x9e65c0, 0x93423c8)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1107 +0xa34 fp=0x953df4c sp=0x953dd58 pc=0x1c6b8
runtime.gcMarkDone()
	runtime/mgc.go:917 +0x290 fp=0x953df80 sp=0x953df4c pc=0x1bb4c
runtime.gcBgMarkWorker()
	runtime/mgc.go:1406 +0x3dc fp=0x953dfec sp=0x953df80 pc=0x1d790
runtime.goexit()
	runtime/asm_arm.s:831 +0x4 fp=0x953dfec sp=0x953dfec pc=0x6e480
created by runtime.gcBgMarkStartWorkers in goroutine 17
	runtime/mgc.go:1198 +0x20

— watchflakes

@rsc rsc mentioned this issue Mar 15, 2023
Closed
@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-03-15 22:01 plan9-arm go@be27fcfd (log) 
runtime: marked free object in span 0x8f3f6dc, elemsize=48 freeindex=127 (bad use of unsafe.Pointer? try -d=checkptr)
0x91b0000 alloc marked  
0x91b0030 alloc marked  
0x91b0060 alloc marked  
0x91b0090 alloc marked  
0x91b00c0 alloc marked  
0x91b00f0 alloc marked  
0x91b0120 alloc marked  
0x91b0150 alloc marked  
0x91b0180 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x4595c6, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1076 +0x4c fp=0x3ffffaa4 sp=0x3ffffa90 pc=0x3bd78
runtime.(*mspan).reportZombies(0x8f3f6dc)
	/boot/workdir/go/src/runtime/mgcsweep.go:846 +0x34c fp=0x3ffffae0 sp=0x3ffffaa4 pc=0x2b5a8
runtime.(*sweepLocked).sweep(0x3ffffb78, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:634 +0xa14 fp=0x3ffffb68 sp=0x3ffffae0 pc=0x2ae90
runtime.(*mcentral).uncacheSpan(0x6fb198, 0x8f3f6dc)
...
runtime.gcMarkTermination()
	/boot/workdir/go/src/runtime/mgc.go:1107 +0xa58 fp=0x94acf44 sp=0x94acd50 pc=0x1c5e4
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:917 +0x338 fp=0x94acf80 sp=0x94acf44 pc=0x1ba40
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1406 +0x3dc fp=0x94acfec sp=0x94acf80 pc=0x1d6bc
runtime.goexit()
	/boot/workdir/go/src/runtime/asm_arm.s:831 +0x4 fp=0x94acfec sp=0x94acfec pc=0x6cfa8
created by runtime.gcBgMarkStartWorkers in goroutine 8
	/boot/workdir/go/src/runtime/mgc.go:1198 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-02-27 16:14 plan9-arm perf@f7320a6d go@fc99c4b3 (log) 
runtime: marked free object in span 0x92c549c, elemsize=128 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x9b04000 free  marked   zombie
0x09b04000:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04010:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04020:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04030:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04040:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04050:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04060:  0x00000000  0x00000000  0x00000000  0x00000000 
0x09b04070:  0x00000000  0x00000000  0x00000000  0x00000000 
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x633d5d, 0x1c})
	runtime/panic.go:1076 +0x4c fp=0x943cec4 sp=0x943ceb0 pc=0x3bf44
runtime.(*mspan).reportZombies(0x92c549c)
	runtime/mgcsweep.go:846 +0x34c fp=0x943cf00 sp=0x943cec4 pc=0x2b6a0
runtime.(*sweepLocked).sweep(0x943cfa0, 0x0)
	runtime/mgcsweep.go:629 +0x304 fp=0x943cf88 sp=0x943cf00 pc=0x2a878
runtime.sweepone()
	runtime/mgcsweep.go:391 +0x108 fp=0x943cfc4 sp=0x943cf88 pc=0x2a274
runtime.bgsweep(0x9460000)
	runtime/mgcsweep.go:299 +0x138 fp=0x943cfe4 sp=0x943cfc4 pc=0x29fd8
runtime.gcenable.func1()
	runtime/mgc.go:178 +0x28 fp=0x943cfec sp=0x943cfe4 pc=0x1a7f8
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x943cfec sp=0x943cfec pc=0x709c8
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-03-29 20:46 plan9-arm go@93b3035d (log) 
runtime: marked free object in span 0x8edafd4, elemsize=144 freeindex=2 (bad use of unsafe.Pointer? try -d=checkptr)
0x92d0000 alloc marked  
0x92d0090 alloc marked  
0x92d0120 free  marked   zombie
0x092d0120:  0x66333235  0x32623034  0x33303266  0x31343865 
0x092d0130:  0x37373632  0x20202020  0x20202020  0x20202020 
0x092d0140:  0x20202020  0x30393620  0x31202034  0x31303836 
0x092d0150:  0x31313332  0x36323532  0x37323330  0x090a3834 
0x092d0160:  0x66203176  0x38313361  0x61303665  0x33313433 
0x092d0170:  0x62366537  0x31306437  0x36346534  0x36393134 
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x45dd56, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1076 +0x4c fp=0x3ffffb98 sp=0x3ffffb84 pc=0x3bd5c
runtime.(*mspan).reportZombies(0x8edafd4)
	/boot/workdir/go/src/runtime/mgcsweep.go:846 +0x34c fp=0x3ffffbd4 sp=0x3ffffb98 pc=0x2b5cc
runtime.(*sweepLocked).sweep(0x3ffffc6c, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:629 +0x304 fp=0x3ffffc5c sp=0x3ffffbd4 pc=0x2a7a4
runtime.(*mcentral).uncacheSpan(0x702810, 0x8edafd4)
...
runtime.gcMarkTermination()
	/boot/workdir/go/src/runtime/mgc.go:1107 +0xa58 fp=0x9548f44 sp=0x9548d50 pc=0x1c5c4
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:917 +0x338 fp=0x9548f80 sp=0x9548f44 pc=0x1ba20
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1406 +0x3dc fp=0x9548fec sp=0x9548f80 pc=0x1d69c
runtime.goexit()
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9548fec sp=0x9548fec pc=0x70708
created by runtime.gcBgMarkStartWorkers in goroutine 9
	/boot/workdir/go/src/runtime/mgc.go:1198 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-02 07:42 plan9-arm go@14cf82aa (log) 
runtime: marked free object in span 0xa26ca0, elemsize=768 freeindex=3 (bad use of unsafe.Pointer? try -d=checkptr)
0x94ce000 alloc marked  
0x94ce300 alloc marked  
0x94ce600 alloc marked  
0x94ce900 free  marked   zombie
0x094ce900:  0x00000005  0x00000000  0x00000000  0x00000000 
0x094ce910:  0x00000000  0x00000000  0x00000003  0x00000002 
0x094ce920:  0x00000004  0x00000000  0x00000000  0x00000000 
0x094ce930:  0x00000002  0x00000003  0x00000002  0x00000000 
0x094ce940:  0x00000000  0x00000000  0x00000007  0x00000005 
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x63efda, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x3ffffc50 sp=0x3ffffc3c pc=0x3cb64
runtime.(*mspan).reportZombies(0xa26ca0)
	runtime/mgcsweep.go:848 +0x34c fp=0x3ffffc8c sp=0x3ffffc50 pc=0x2bd90
runtime.(*sweepLocked).sweep(0x3ffffd24, 0x0)
	runtime/mgcsweep.go:631 +0x304 fp=0x3ffffd14 sp=0x3ffffc8c pc=0x2af68
runtime.(*mcentral).uncacheSpan(0xa080f8, 0xa26ca0)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1095 +0xa44 fp=0x95c9f44 sp=0x95c9d50 pc=0x1c64c
runtime.gcMarkDone()
	runtime/mgc.go:917 +0x338 fp=0x95c9f80 sp=0x95c9f44 pc=0x1babc
runtime.gcBgMarkWorker()
	runtime/mgc.go:1429 +0x3dc fp=0x95c9fec sp=0x95c9f80 pc=0x1d7a0
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x95c9fec sp=0x95c9fec pc=0x71c40
created by runtime.gcBgMarkStartWorkers in goroutine 18
	runtime/mgc.go:1221 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-11 23:39 plan9-arm go@1b630b5b (log) 
runtime: marked free object in span 0x9306320, elemsize=64 freeindex=3 (bad use of unsafe.Pointer? try -d=checkptr)
0x95e0000 alloc marked  
0x95e0040 alloc marked  
0x95e0080 alloc marked  
0x95e00c0 alloc marked  
0x95e0100 alloc marked  
0x95e0140 alloc marked  
0x95e0180 free  marked   zombie
0x095e0180:  0x09403700  0x00000000  0x00000000  0x00a35034 
0x095e0190:  0x00000000  0x00000000  0x00000000  0x00000000 
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6548f0, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x3ffffa90 sp=0x3ffffa7c pc=0x4004c
runtime.(*mspan).reportZombies(0x9306320)
	runtime/mgcsweep.go:848 +0x34c fp=0x3ffffacc sp=0x3ffffa90 pc=0x2f3f0
runtime.(*sweepLocked).sweep(0x3ffffb70, 0x0)
	runtime/mgcsweep.go:631 +0x304 fp=0x3ffffb60 sp=0x3ffffacc pc=0x2e3f0
runtime.(*mcentral).uncacheSpan(0xa39908, 0x9306320)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1118 +0xa64 fp=0x96c4f44 sp=0x96c4d50 pc=0x1faf4
runtime.gcMarkDone()
	runtime/mgc.go:917 +0x338 fp=0x96c4f80 sp=0x96c4f44 pc=0x1ef44
runtime.gcBgMarkWorker()
	runtime/mgc.go:1429 +0x3dc fp=0x96c4fec sp=0x96c4f80 pc=0x20c28
runtime.goexit()
	runtime/asm_arm.s:831 +0x4 fp=0x96c4fec sp=0x96c4fec pc=0x7521c
created by runtime.gcBgMarkStartWorkers in goroutine 17
	runtime/mgc.go:1221 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-11 04:50 plan9-arm go@a2838ec5 (log) 
runtime: marked free object in span 0x9300f4c, elemsize=32 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x968c000 alloc marked  
0x968c020 alloc marked  
0x968c040 alloc marked  
0x968c060 alloc marked  
0x968c080 alloc marked  
0x968c0a0 alloc marked  
0x968c0c0 alloc marked  
0x968c0e0 alloc marked  
0x968c100 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x653e50, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x9440eb8 sp=0x9440ea4 pc=0x40030
runtime.(*mspan).reportZombies(0x9300f4c)
	runtime/mgcsweep.go:848 +0x34c fp=0x9440ef4 sp=0x9440eb8 pc=0x2f3d4
runtime.(*sweepLocked).sweep(0x9440fa0, 0x0)
	runtime/mgcsweep.go:636 +0xa74 fp=0x9440f88 sp=0x9440ef4 pc=0x2eb44
runtime.sweepone()
	runtime/mgcsweep.go:393 +0x108 fp=0x9440fc4 sp=0x9440f88 pc=0x2ddd0
runtime.bgsweep(0x9430080)
	runtime/mgcsweep.go:301 +0x138 fp=0x9440fe4 sp=0x9440fc4 pc=0x2db34
runtime.gcenable.func1()
	runtime/mgc.go:178 +0x28 fp=0x9440fec sp=0x9440fe4 pc=0x1dc34
runtime.goexit()
	runtime/asm_arm.s:831 +0x4 fp=0x9440fec sp=0x9440fec pc=0x754e8
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-09 19:55 plan9-arm go@841e99e2 (log) 
runtime: marked free object in span 0xa4b2b8, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x9500000 alloc marked  
0x9500008 alloc marked  
0x9500010 alloc marked  
0x9500018 alloc marked  
0x9500020 alloc marked  
0x9500028 alloc marked  
0x9500030 alloc marked  
0x9500038 alloc marked  
0x9500040 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x650362, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x943eeb8 sp=0x943eea4 pc=0x3cd90
runtime.(*mspan).reportZombies(0xa4b2b8)
	runtime/mgcsweep.go:848 +0x34c fp=0x943eef4 sp=0x943eeb8 pc=0x2c07c
runtime.(*sweepLocked).sweep(0x943efa0, 0x0)
	runtime/mgcsweep.go:636 +0xa74 fp=0x943ef88 sp=0x943eef4 pc=0x2b7ec
runtime.sweepone()
	runtime/mgcsweep.go:393 +0x108 fp=0x943efc4 sp=0x943ef88 pc=0x2aa78
runtime.bgsweep(0x942e080)
	runtime/mgcsweep.go:301 +0x138 fp=0x943efe4 sp=0x943efc4 pc=0x2a7dc
runtime.gcenable.func1()
	runtime/mgc.go:178 +0x28 fp=0x943efec sp=0x943efe4 pc=0x1a8dc
runtime.goexit()
	runtime/asm_arm.s:831 +0x4 fp=0x943efec sp=0x943efec pc=0x72240
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-18 18:39 plan9-arm go@66432e1b (log) 
runtime: marked free object in span 0x8fbb6b8, elemsize=24 freeindex=288 (bad use of unsafe.Pointer? try -d=checkptr)
0x94f0000 alloc marked  
0x94f0018 alloc marked  
0x94f0030 alloc marked  
0x94f0048 alloc marked  
0x94f0060 alloc unmarked
0x94f0078 alloc marked  
0x94f0090 alloc marked  
0x94f00a8 alloc unmarked
0x94f00c0 alloc unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x483f74, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1077 +0x4c fp=0x3ffffc00 sp=0x3ffffbec pc=0x40594
runtime.(*mspan).reportZombies(0x8fbb6b8)
	/boot/workdir/go/src/runtime/mgcsweep.go:848 +0x34c fp=0x3ffffc3c sp=0x3ffffc00 pc=0x2f990
runtime.(*sweepLocked).sweep(0x3ffffce0, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:631 +0x304 fp=0x3ffffcd0 sp=0x3ffffc3c pc=0x2e990
runtime.(*mcentral).uncacheSpan(0x74f5c0, 0x8fbb6b8)
...
runtime.gcMarkTermination()
	/boot/workdir/go/src/runtime/mgc.go:1095 +0xa4c fp=0x9490f44 sp=0x9490d50 pc=0x20024
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:917 +0x33c fp=0x9490f80 sp=0x9490f44 pc=0x1f48c
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1429 +0x3e4 fp=0x9490fec sp=0x9490f80 pc=0x2118c
runtime.goexit()
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9490fec sp=0x9490fec pc=0x75f14
created by runtime.gcBgMarkStartWorkers in goroutine 1
	/boot/workdir/go/src/runtime/mgc.go:1221 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-24 22:24 plan9-arm go@15a4e0d9 (log) 
runtime: marked free object in span 0x93426c8, elemsize=48 freeindex=57 (bad use of unsafe.Pointer? try -d=checkptr)
0x96ba000 alloc marked  
0x96ba030 alloc unmarked
0x96ba060 alloc unmarked
0x96ba090 alloc unmarked
0x96ba0c0 alloc unmarked
0x96ba0f0 alloc unmarked
0x96ba120 alloc unmarked
0x96ba150 alloc unmarked
0x96ba180 alloc unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x667f0d, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x3ffff830 sp=0x3ffff81c pc=0x40d9c
runtime.(*mspan).reportZombies(0x93426c8)
	runtime/mgcsweep.go:861 +0x34c fp=0x3ffff86c sp=0x3ffff830 pc=0x2fce0
runtime.(*sweepLocked).sweep(0x3ffff910, 0x0)
	runtime/mgcsweep.go:644 +0xa8c fp=0x3ffff900 sp=0x3ffff86c pc=0x2f450
runtime.(*mcentral).uncacheSpan(0xa5c9c8, 0x93426c8)
...
	runtime/proc.go:3553 +0xac fp=0x3ffffa78 sp=0x3ffffa5c pc=0x4b350
runtime.park_m(0x95ae900)
	runtime/proc.go:3704 +0x160 fp=0x3ffffa94 sp=0x3ffffa78 pc=0x4bb60
runtime.mcall()
	runtime/asm_arm.s:265 +0x48 fp=0x3ffffa9c sp=0x3ffffa94 pc=0x74ff4

goroutine 8 [running]:
	goroutine running on other thread; stack unavailable
created by runtime.gcBgMarkStartWorkers in goroutine 18
	runtime/mgc.go:1195 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-24 23:56 plan9-arm go@6d05bc78 (log) 
runtime: marked free object in span 0x92c1b70, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x97f0000 alloc marked  
0x97f0018 alloc marked  
0x97f0030 alloc marked  
0x97f0048 alloc marked  
0x97f0060 alloc marked  
0x97f0078 alloc marked  
0x97f0090 alloc marked  
0x97f00a8 alloc marked  
0x97f00c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x66cf55, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x943eeb8 sp=0x943eea4 pc=0x40d9c
runtime.(*mspan).reportZombies(0x92c1b70)
	runtime/mgcsweep.go:861 +0x34c fp=0x943eef4 sp=0x943eeb8 pc=0x2fce0
runtime.(*sweepLocked).sweep(0x943efa0, 0x0)
	runtime/mgcsweep.go:644 +0xa8c fp=0x943ef88 sp=0x943eef4 pc=0x2f450
runtime.sweepone()
	runtime/mgcsweep.go:393 +0x108 fp=0x943efc4 sp=0x943ef88 pc=0x2e6c4
runtime.bgsweep(0x942e080)
	runtime/mgcsweep.go:301 +0x138 fp=0x943efe4 sp=0x943efc4 pc=0x2e428
runtime.gcenable.func1()
	runtime/mgc.go:178 +0x28 fp=0x943efec sp=0x943efe4 pc=0x1e790
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x943efec sp=0x943efec pc=0x76b6c
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-23 19:14 plan9-arm go@1eae5c16 (log) 
runtime: marked free object in span 0x8ebcab0, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x96f6000 alloc marked  
0x96f6008 alloc marked  
0x96f6010 alloc marked  
0x96f6018 alloc marked  
0x96f6020 alloc marked  
0x96f6028 alloc marked  
0x96f6030 alloc marked  
0x96f6038 alloc marked  
0x96f6040 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x48b133, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1077 +0x4c fp=0x9044eb8 sp=0x9044ea4 pc=0x407f4
runtime.(*mspan).reportZombies(0x8ebcab0)
	/boot/workdir/go/src/runtime/mgcsweep.go:861 +0x34c fp=0x9044ef4 sp=0x9044eb8 pc=0x2fb3c
runtime.(*sweepLocked).sweep(0x9044fa0, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:644 +0xa8c fp=0x9044f88 sp=0x9044ef4 pc=0x2f2ac
runtime.sweepone()
	/boot/workdir/go/src/runtime/mgcsweep.go:393 +0x108 fp=0x9044fc4 sp=0x9044f88 pc=0x2e520
runtime.bgsweep(0x90360c0)
	/boot/workdir/go/src/runtime/mgcsweep.go:301 +0x138 fp=0x9044fe4 sp=0x9044fc4 pc=0x2e284
runtime.gcenable.func1()
	/boot/workdir/go/src/runtime/mgc.go:178 +0x28 fp=0x9044fec sp=0x9044fe4 pc=0x1e2c4
runtime.goexit()
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9044fec sp=0x9044fec pc=0x763f4
created by runtime.gcenable in goroutine 1
	/boot/workdir/go/src/runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-05-26 20:41 plan9-arm go@142b012e (log) 
runtime: marked free object in span 0x10b45450, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x10e34000 alloc marked  
0x10e34018 alloc marked  
0x10e34030 alloc marked  
0x10e34048 alloc marked  
0x10e34060 alloc marked  
0x10e34078 alloc marked  
0x10e34090 alloc marked  
0x10e340a8 alloc marked  
0x10e340c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x51ed22, 0x1c})
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/panic.go:1198 +0x5c fp=0x10c44ee0 sp=0x10c44ecc pc=0x37a74
runtime.(*mspan).reportZombies(0x10b45450)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:691 +0x350 fp=0x10c44f20 sp=0x10c44ee0 pc=0x26b14
runtime.(*sweepLocked).sweep(0x10c44fb4, 0x0)
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:524 +0x834 fp=0x10c44f9c sp=0x10c44f20 pc=0x26470
runtime.sweepone()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:290 +0x110 fp=0x10c44fd8 sp=0x10c44f9c pc=0x25914
runtime.bgsweep()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:166 +0x148 fp=0x10c44fec sp=0x10c44fd8 pc=0x25418
runtime.goexit()
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/asm_arm.s:838 +0x4 fp=0x10c44fec sp=0x10c44fec pc=0x65138
created by runtime.gcenable
	/tmp/genbootstrap-3894857761/go-plan9-arm-bootstrap/src/runtime/mgc.go:181 +0x60

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-06-06 12:28 plan9-arm go@512361fb cmd/vet.TestVet (log) 
--- FAIL: TestVet (0.00s)
    --- FAIL: TestVet/method (26.49s)
        vet_test.go:147: error check failed: 
            method.go:13: missing error "should have signature Scan\\(fmt\\.ScanState, rune\\) error"
            Unmatched Errors:
            runtime: marked free object in span 0x9344bc0, elemsize=96 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
            0x96c2000 alloc marked  
            0x96c2060 alloc marked  
            0x96c20c0 alloc marked  
            0x96c2120 alloc marked  
...
            fatal error: found pointer to free object
            goroutine 3 [running]:
            runtime.throw({0x67b4e3, 0x1c})
            	runtime/panic.go:1077 +0x4c fp=0x9440eb8 sp=0x9440ea4 pc=0x40d9c
            runtime.(*mspan).reportZombies(0x9344bc0)
            	runtime/mgcsweep.go:861 +0x34c fp=0x9440ef4 sp=0x9440eb8 pc=0x2fce0
            runtime.(*sweepLocked).sweep(0x9440fa0, 0x0)
            	runtime/mgcsweep.go:644 +0xa8c fp=0x9440f88 sp=0x9440ef4 pc=0x2f450
            runtime.sweepone()
            	runtime/mgcsweep.go:393 +0x108 fp=0x9440fc4 sp=0x9440f88 pc=0x2e6c4
...
            runtime.gopark(0x6befb0, 0x0, 0x9, 0x18, 0x1)
            	runtime/proc.go:398 +0x104 fp=0x97e0ee8 sp=0x97e0ed4 pc=0x43ff8
            runtime.selectgo(0x97e0fd8, 0x97e0fac, 0x0, 0x0, 0x2, 0x1)
            	runtime/select.go:327 +0xae8 fp=0x97e0f84 sp=0x97e0ee8 pc=0x5636c
            cmd/go/internal/work.(*Builder).Do.func4()
            	cmd/go/internal/work/exec.go:209 +0x12c fp=0x97e0fec sp=0x97e0f84 pc=0x51d8ec
            runtime.goexit()
            	runtime/asm_arm.s:859 +0x4 fp=0x97e0fec sp=0x97e0fec pc=0x76b54
            created by cmd/go/internal/work.(*Builder).Do in goroutine 1
            	cmd/go/internal/work/exec.go:205 +0x3b0

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-04-27 22:15 plan9-arm perf@d343f639 go@9fc84363 (log) 
runtime: marked free object in span 0xa83f38, elemsize=48 freeindex=51 (bad use of unsafe.Pointer? try -d=checkptr)
0x9718000 alloc marked  
0x9718030 alloc marked  
0x9718060 alloc marked  
0x9718090 alloc marked  
0x97180c0 alloc marked  
0x97180f0 alloc marked  
0x9718120 alloc marked  
0x9718150 alloc marked  
0x9718180 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x67d4e9, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x3ffffbac sp=0x3ffffb98 pc=0x40fe4
runtime.(*mspan).reportZombies(0xa83f38)
	runtime/mgcsweep.go:861 +0x34c fp=0x3ffffbe8 sp=0x3ffffbac pc=0x2fe50
runtime.(*sweepLocked).sweep(0x3ffffc8c, 0x0)
	runtime/mgcsweep.go:644 +0xa8c fp=0x3ffffc7c sp=0x3ffffbe8 pc=0x2f5bc
runtime.(*mcentral).uncacheSpan(0xa61b20, 0xa83f38)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1113 +0x6d4 fp=0x963af4c sp=0x963ada8 pc=0x2036c
runtime.gcMarkDone()
	runtime/mgc.go:938 +0x2fc fp=0x963af80 sp=0x963af4c pc=0x1fb50
runtime.gcBgMarkWorker()
	runtime/mgc.go:1425 +0x3e8 fp=0x963afec sp=0x963af80 pc=0x2149c
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x963afec sp=0x963afec pc=0x7705c
created by runtime.gcBgMarkStartWorkers in goroutine 51
	runtime/mgc.go:1217 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-06-12 17:38 plan9-arm term@f6de4a13 go@f6e0dcc4 (log) 
runtime: marked free object in span 0x9302630, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x97be000 alloc marked  
0x97be018 alloc marked  
0x97be030 alloc marked  
0x97be048 alloc marked  
0x97be060 alloc marked  
0x97be078 alloc marked  
0x97be090 alloc marked  
0x97be0a8 alloc marked  
0x97be0c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x67d539, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x943ceb8 sp=0x943cea4 pc=0x40fe4
runtime.(*mspan).reportZombies(0x9302630)
	runtime/mgcsweep.go:861 +0x34c fp=0x943cef4 sp=0x943ceb8 pc=0x2fe50
runtime.(*sweepLocked).sweep(0x943cfa0, 0x0)
	runtime/mgcsweep.go:644 +0xa8c fp=0x943cf88 sp=0x943cef4 pc=0x2f5bc
runtime.sweepone()
...
	runtime/mgc.go:200 +0x28 fp=0x943cfec sp=0x943cfe4 pc=0x1e824
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x943cfec sp=0x943cfec pc=0x7705c
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:200 +0x74

goroutine 1005 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	cmd/go/internal/work/exec.go:205 +0x3b0

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-06-21 14:58 plan9-arm net@c8a2c5a1 go@b1f1fb29 (log) 
runtime: marked free object in span 0x93414c8, elemsize=32 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x99e2000 free  unmarked
0x99e2020 free  unmarked
0x99e2040 free  unmarked
0x99e2060 free  unmarked
0x99e2080 free  unmarked
0x99e20a0 free  unmarked
0x99e20c0 alloc marked  
0x99e20e0 free  unmarked
0x99e2100 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x67e31f, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x943ceb8 sp=0x943cea4 pc=0x40fe4
runtime.(*mspan).reportZombies(0x93414c8)
	runtime/mgcsweep.go:861 +0x34c fp=0x943cef4 sp=0x943ceb8 pc=0x2fe50
runtime.(*sweepLocked).sweep(0x943cfa0, 0x0)
	runtime/mgcsweep.go:644 +0xa8c fp=0x943cf88 sp=0x943cef4 pc=0x2f5bc
runtime.sweepone()
	runtime/mgcsweep.go:393 +0x108 fp=0x943cfc4 sp=0x943cf88 pc=0x2e82c
runtime.bgsweep(0x9460000)
	runtime/mgcsweep.go:301 +0x144 fp=0x943cfe4 sp=0x943cfc4 pc=0x2e590
runtime.gcenable.func1()
	runtime/mgc.go:200 +0x28 fp=0x943cfec sp=0x943cfe4 pc=0x1e824
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x943cfec sp=0x943cfec pc=0x7705c
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:200 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-06-01 20:35 plan9-arm sync@93782cc8 go@3fce1115 (log) 
runtime: marked free object in span 0x9346ab8, elemsize=24 freeindex=167 (bad use of unsafe.Pointer? try -d=checkptr)
0x96da000 alloc marked  
0x96da018 alloc marked  
0x96da030 alloc marked  
0x96da048 alloc marked  
0x96da060 alloc marked  
0x96da078 alloc marked  
0x96da090 alloc marked  
0x96da0a8 alloc marked  
0x96da0c0 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x67fb8e, 0x1c})
	runtime/panic.go:1077 +0x4c fp=0x3ffffb70 sp=0x3ffffb5c pc=0x40fe4
runtime.(*mspan).reportZombies(0x9346ab8)
	runtime/mgcsweep.go:861 +0x34c fp=0x3ffffbac sp=0x3ffffb70 pc=0x2fe50
runtime.(*sweepLocked).sweep(0x3ffffc50, 0x0)
	runtime/mgcsweep.go:644 +0xa8c fp=0x3ffffc40 sp=0x3ffffbac pc=0x2f5bc
runtime.(*mcentral).uncacheSpan(0xa65cf0, 0x9346ab8)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1113 +0x6d4 fp=0x9657f4c sp=0x9657da8 pc=0x2036c
runtime.gcMarkDone()
	runtime/mgc.go:938 +0x2fc fp=0x9657f80 sp=0x9657f4c pc=0x1fb50
runtime.gcBgMarkWorker()
	runtime/mgc.go:1425 +0x3e8 fp=0x9657fec sp=0x9657f80 pc=0x2149c
runtime.goexit()
	runtime/asm_arm.s:859 +0x4 fp=0x9657fec sp=0x9657fec pc=0x77098
created by runtime.gcBgMarkStartWorkers in goroutine 18
	runtime/mgc.go:1217 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-10-13 13:56 plan9-arm go@696fb5ea (log) 
runtime: marked free object in span 0x934292c, elemsize=8 freeindex=5 (bad use of unsafe.Pointer? try -d=checkptr)
0x9822000 alloc unmarked
0x9822008 alloc marked  
0x9822010 alloc marked  
0x9822018 alloc marked  
0x9822020 alloc marked  
0x9822028 alloc marked  
0x9822030 free  unmarked
0x9822038 free  unmarked
0x9822040 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x67af35, 0x1c})
	runtime/panic.go:1018 +0x4c fp=0x3ffff9b0 sp=0x3ffff99c pc=0x41070
runtime.(*mspan).reportZombies(0x934292c)
	runtime/mgcsweep.go:856 +0x34c fp=0x3ffff9e8 sp=0x3ffff9b0 pc=0x303d8
runtime.(*sweepLocked).sweep(0x3ffffa88, 0x0)
	runtime/mgcsweep.go:639 +0xa84 fp=0x3ffffa78 sp=0x3ffff9e8 pc=0x2fb44
runtime.(*mcentral).uncacheSpan(0xa5fb98, 0x934292c)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1117 +0x6f4 fp=0x96c6f4c sp=0x96c6d9c pc=0x20938
runtime.gcMarkDone()
	runtime/mgc.go:935 +0x2f4 fp=0x96c6f80 sp=0x96c6f4c pc=0x200fc
runtime.gcBgMarkWorker()
	runtime/mgc.go:1435 +0x3d8 fp=0x96c6fec sp=0x96c6f80 pc=0x21bb4
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x96c6fec sp=0x96c6fec pc=0x76a8c
created by runtime.gcBgMarkStartWorkers in goroutine 9
	runtime/mgc.go:1227 +0x20
2023-10-19 00:53 plan9-arm go@40cdf69f (log) 
runtime: marked free object in span 0x779680, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x92dc000 alloc marked  
0x92dc008 alloc marked  
0x92dc010 alloc marked  
0x92dc018 alloc marked  
0x92dc020 alloc marked  
0x92dc028 alloc marked  
0x92dc030 alloc marked  
0x92dc038 alloc marked  
0x92dc040 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x493cbc, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1016 +0x4c fp=0x9044ec0 sp=0x9044eac pc=0x40f08
runtime.(*mspan).reportZombies(0x779680)
	/boot/workdir/go/src/runtime/mgcsweep.go:856 +0x34c fp=0x9044ef8 sp=0x9044ec0 pc=0x30358
runtime.(*sweepLocked).sweep(0x9044fa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:639 +0xa84 fp=0x9044f88 sp=0x9044ef8 pc=0x2fac4
runtime.sweepone()
...
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9044fec sp=0x9044fec pc=0x768cc
created by runtime.gcenable in goroutine 1
	/boot/workdir/go/src/runtime/mgc.go:203 +0x74

goroutine 4908 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:205 +0x3a8
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install cmd: exit status: 'go_bootstrap 8546: 2'
2023-10-24 17:49 plan9-arm go@25ad137c (log) 
runtime: marked free object in span 0x77d090, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x911e000 alloc marked  
0x911e008 alloc marked  
0x911e010 alloc marked  
0x911e018 alloc marked  
0x911e020 alloc marked  
0x911e028 alloc marked  
0x911e030 alloc marked  
0x911e038 alloc marked  
0x911e040 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x495a7b, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1016 +0x4c fp=0x9042ec0 sp=0x9042eac pc=0x40f08
runtime.(*mspan).reportZombies(0x77d090)
	/boot/workdir/go/src/runtime/mgcsweep.go:856 +0x34c fp=0x9042ef8 sp=0x9042ec0 pc=0x30358
runtime.(*sweepLocked).sweep(0x9042fa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:639 +0xa84 fp=0x9042f88 sp=0x9042ef8 pc=0x2fac4
runtime.sweepone()
...
goroutine 1495 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:206 +0x3a8

goroutine 1494 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:206 +0x3a8
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install -pgo=off cmd/asm cmd/cgo cmd/compile cmd/link: exit status: 'go_bootstrap 3537: 2'
2023-10-24 20:26 plan9-arm go@9ab51216 (log) 
runtime: marked free object in span 0x9e90c4, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x9418000 alloc marked  
0x9418008 alloc marked  
0x9418010 alloc marked  
0x9418018 alloc marked  
0x9418020 alloc marked  
0x9418028 alloc marked  
0x9418030 alloc marked  
0x9418038 alloc marked  
0x9418040 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x61418c, 0x1c})
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/panic.go:1047 +0x4c fp=0x9442ec8 sp=0x9442eb4 pc=0x3aca0
runtime.(*mspan).reportZombies(0x9e90c4)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:846 +0x35c fp=0x9442f08 sp=0x9442ec8 pc=0x2a270
runtime.(*sweepLocked).sweep(0x9442fa4, 0x0)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:634 +0xa00 fp=0x9442f8c sp=0x9442f08 pc=0x29b48
runtime.sweepone()
...

goroutine 2049 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/cmd/go/internal/work/exec.go:197 +0x394

goroutine 2051 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/cmd/go/internal/work/exec.go:197 +0x394

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-02 04:17 plan9-arm go@6a7ef364 (log) 
runtime: marked free object in span 0x93483c0, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x999e000 free  unmarked
0x999e008 free  unmarked
0x999e010 free  unmarked
0x999e018 free  unmarked
0x999e020 free  unmarked
0x999e028 free  unmarked
0x999e030 free  unmarked
0x999e038 free  unmarked
0x999e040 free  unmarked
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x67dbac, 0x1c})
	runtime/panic.go:1016 +0x4c fp=0x9448ec0 sp=0x9448eac pc=0x407a0
runtime.(*mspan).reportZombies(0x93483c0)
	runtime/mgcsweep.go:856 +0x34c fp=0x9448ef8 sp=0x9448ec0 pc=0x2fb3c
runtime.(*sweepLocked).sweep(0x9448fa8, 0x0)
	runtime/mgcsweep.go:639 +0xa80 fp=0x9448f88 sp=0x9448ef8 pc=0x2f2a8
runtime.sweepone()
	runtime/mgcsweep.go:388 +0x108 fp=0x9448fc4 sp=0x9448f88 pc=0x2e524
runtime.bgsweep(0x9430080)
	runtime/mgcsweep.go:297 +0x144 fp=0x9448fe4 sp=0x9448fc4 pc=0x2e2a0
runtime.gcenable.gowrap1()
	runtime/mgc.go:203 +0x28 fp=0x9448fec sp=0x9448fe4 pc=0x1e578
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x9448fec sp=0x9448fec pc=0x761a4
created by runtime.gcenable in goroutine 1
	runtime/mgc.go:203 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-10-30 17:08 plan9-arm go@ecda959b (log) 
runtime: marked free object in span 0x9283360, elemsize=8 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x97ac000 alloc marked  
0x97ac008 alloc marked  
0x97ac010 alloc marked  
0x97ac018 alloc marked  
0x97ac020 alloc marked  
0x97ac028 alloc marked  
0x97ac030 alloc marked  
0x97ac038 alloc marked  
0x97ac040 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x61418c, 0x1c})
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/panic.go:1047 +0x4c fp=0x9442ec8 sp=0x9442eb4 pc=0x3aca0
runtime.(*mspan).reportZombies(0x9283360)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:846 +0x35c fp=0x9442f08 sp=0x9442ec8 pc=0x2a270
runtime.(*sweepLocked).sweep(0x9442fa4, 0x0)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:634 +0xa00 fp=0x9442f8c sp=0x9442f08 pc=0x29b48
runtime.sweepone()
...
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgc.go:178 +0x28 fp=0x9442fec sp=0x9442fe4 pc=0x195c8
runtime.goexit()
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/asm_arm.s:831 +0x4 fp=0x9442fec sp=0x9442fec pc=0x6b450
created by runtime.gcenable
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgc.go:178 +0x74

goroutine 1960 [running]:
	goroutine running on other thread; stack unavailable
created by cmd/go/internal/work.(*Builder).Do
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/cmd/go/internal/work/exec.go:197 +0x394

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-03 07:49 plan9-arm go@642b1311 (log) 
runtime: marked free object in span 0x259ef4, elemsize=384 freeindex=1 (bad use of unsafe.Pointer? try -d=checkptr)
0x8e86000 alloc unmarked
0x8e86180 free  unmarked
0x8e86300 alloc unmarked
0x8e86480 free  unmarked
0x8e86600 alloc unmarked
0x8e86780 free  marked   zombie
0x08e86780:  0x53686374  0x6e697274  0x79742e67  0x2e3a6570 
0x08e86790:  0x656d616e  0x61746164  0x75662a2e  0x7328636e 
0x08e867a0:  0x6e697274  0x62202967  0x2d6c6f6f  0x65707974 
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x159841, 0x1c})
	/boot/workdir/go1.4/src/runtime/panic.go:1047 +0x4c fp=0x3ffffb3c sp=0x3ffffb28 pc=0x3927c
runtime.(*mspan).reportZombies(0x259ef4)
	/boot/workdir/go1.4/src/runtime/mgcsweep.go:846 +0x35c fp=0x3ffffb7c sp=0x3ffffb3c pc=0x28c48
runtime.(*sweepLocked).sweep(0x3ffffc10, 0x0)
	/boot/workdir/go1.4/src/runtime/mgcsweep.go:629 +0x2fc fp=0x3ffffc00 sp=0x3ffffb7c pc=0x27e1c
runtime.(*mcentral).uncacheSpan(0x23e3f8, 0x259ef4)
...
	/boot/workdir/go1.4/src/runtime/proc.go:3378 +0xac fp=0x3ffffd50 sp=0x3ffffd34 pc=0x431fc
runtime.park_m(0x8dfd3b0)
	/boot/workdir/go1.4/src/runtime/proc.go:3529 +0x150 fp=0x3ffffd64 sp=0x3ffffd50 pc=0x439ec
runtime.mcall()
	/boot/workdir/go1.4/src/runtime/asm_arm.s:265 +0x48 fp=0x3ffffd6c sp=0x3ffffd64 pc=0x6664c

goroutine 11 [running]:
	goroutine running on other thread; stack unavailable
created by runtime.gcBgMarkStartWorkers
	/boot/workdir/go1.4/src/runtime/mgc.go:1199 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-05 19:03 plan9-arm go@4cd201b1 (log) 
runtime: marked free object in span 0x933f960, elemsize=16 freeindex=3 (bad use of unsafe.Pointer? try -d=checkptr)
0x959c000 alloc marked  
0x959c010 alloc unmarked
0x959c020 alloc unmarked
0x959c030 alloc marked  
0x959c040 free  unmarked
0x959c050 alloc marked  
0x959c060 free  unmarked
0x959c070 free  unmarked
0x959c080 free  unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x67dc8e, 0x1c})
	runtime/panic.go:1016 +0x4c fp=0x3ffffbdc sp=0x3ffffbc8 pc=0x407a0
runtime.(*mspan).reportZombies(0x933f960)
	runtime/mgcsweep.go:856 +0x34c fp=0x3ffffc14 sp=0x3ffffbdc pc=0x2fb3c
runtime.(*sweepLocked).sweep(0x3ffffcb4, 0x0)
	runtime/mgcsweep.go:639 +0xa80 fp=0x3ffffca4 sp=0x3ffffc14 pc=0x2f2a8
runtime.(*mcentral).uncacheSpan(0xa63db0, 0x933f960)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1117 +0x6f4 fp=0x9940f4c sp=0x9940d9c pc=0x20098
runtime.gcMarkDone()
	runtime/mgc.go:935 +0x2f4 fp=0x9940f80 sp=0x9940f4c pc=0x1f85c
runtime.gcBgMarkWorker()
	runtime/mgc.go:1435 +0x3d8 fp=0x9940fec sp=0x9940f80 pc=0x21314
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x9940fec sp=0x9940fec pc=0x761a4
created by runtime.gcBgMarkStartWorkers in goroutine 9
	runtime/mgc.go:1227 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-06 19:46 plan9-arm go@f8c5d04e (log) 
runtime: marked free object in span 0x8f01288, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x9204000 alloc marked  
0x9204018 alloc marked  
0x9204030 alloc marked  
0x9204048 alloc marked  
0x9204060 alloc marked  
0x9204078 alloc marked  
0x9204090 alloc marked  
0x92040a8 alloc marked  
0x92040c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x49613c, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1016 +0x4c fp=0x904cec0 sp=0x904ceac pc=0x40c4c
runtime.(*mspan).reportZombies(0x8f01288)
	/boot/workdir/go/src/runtime/mgcsweep.go:856 +0x34c fp=0x904cef8 sp=0x904cec0 pc=0x300a8
runtime.(*sweepLocked).sweep(0x904cfa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:639 +0xa80 fp=0x904cf88 sp=0x904cef8 pc=0x2f814
runtime.sweepone()
	/boot/workdir/go/src/runtime/mgcsweep.go:388 +0x108 fp=0x904cfc4 sp=0x904cf88 pc=0x2ea90
runtime.bgsweep(0x90360c0)
	/boot/workdir/go/src/runtime/mgcsweep.go:297 +0x144 fp=0x904cfe4 sp=0x904cfc4 pc=0x2e80c
runtime.gcenable.gowrap1()
	/boot/workdir/go/src/runtime/mgc.go:203 +0x28 fp=0x904cfec sp=0x904cfe4 pc=0x1eae4
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x904cfec sp=0x904cfec pc=0x765f8
created by runtime.gcenable in goroutine 1
	/boot/workdir/go/src/runtime/mgc.go:203 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-08 17:51 plan9-arm go@eebeca80 (log) 
runtime: marked free object in span 0x92c44b0, elemsize=512 freeindex=9 (bad use of unsafe.Pointer? try -d=checkptr)
0x9556000 alloc marked  
0x9556200 alloc marked  
0x9556400 alloc unmarked
0x9556600 alloc unmarked
0x9556800 alloc unmarked
0x9556a00 alloc marked  
0x9556c00 alloc unmarked
0x9556e00 alloc unmarked
0x9557000 alloc unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x67df15, 0x1c})
	runtime/panic.go:1016 +0x4c fp=0x3ffffb94 sp=0x3ffffb80 pc=0x4077c
runtime.(*mspan).reportZombies(0x92c44b0)
	runtime/mgcsweep.go:856 +0x34c fp=0x3ffffbcc sp=0x3ffffb94 pc=0x2fb18
runtime.(*sweepLocked).sweep(0x3ffffc6c, 0x0)
	runtime/mgcsweep.go:634 +0x308 fp=0x3ffffc5c sp=0x3ffffbcc pc=0x2eb0c
runtime.(*mcentral).uncacheSpan(0xa66630, 0x92c44b0)
...
runtime.gcMarkTermination()
	runtime/mgc.go:1115 +0x6ec fp=0x98cbf4c sp=0x98cbd9c pc=0x20084
runtime.gcMarkDone()
	runtime/mgc.go:933 +0x2f4 fp=0x98cbf80 sp=0x98cbf4c pc=0x1f850
runtime.gcBgMarkWorker()
	runtime/mgc.go:1433 +0x3d8 fp=0x98cbfec sp=0x98cbf80 pc=0x212f0
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x98cbfec sp=0x98cbfec pc=0x76180
created by runtime.gcBgMarkStartWorkers in goroutine 8
	runtime/mgc.go:1225 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-13 22:12 plan9-arm go@773039ed (log) 
runtime: marked free object in span 0x9345564, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x959e000 alloc marked  
0x959e018 alloc marked  
0x959e030 alloc marked  
0x959e048 alloc marked  
0x959e060 alloc marked  
0x959e078 alloc marked  
0x959e090 alloc marked  
0x959e0a8 alloc marked  
0x959e0c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw({0x61418c, 0x1c})
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/panic.go:1047 +0x4c fp=0x9442ec8 sp=0x9442eb4 pc=0x3aca0
runtime.(*mspan).reportZombies(0x9345564)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:846 +0x35c fp=0x9442f08 sp=0x9442ec8 pc=0x2a270
runtime.(*sweepLocked).sweep(0x9442fa4, 0x0)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:634 +0xa00 fp=0x9442f8c sp=0x9442f08 pc=0x29b48
runtime.sweepone()
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:391 +0x108 fp=0x9442fc8 sp=0x9442f8c pc=0x28e48
runtime.bgsweep(0x9466000)
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgcsweep.go:299 +0x12c fp=0x9442fe4 sp=0x9442fc8 pc=0x28ba8
runtime.gcenable.func1()
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgc.go:178 +0x28 fp=0x9442fec sp=0x9442fe4 pc=0x195c8
runtime.goexit()
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/asm_arm.s:831 +0x4 fp=0x9442fec sp=0x9442fec pc=0x6b450
created by runtime.gcenable
	/tmp/genbootstrap-3479644045/go-plan9-arm-bootstrap/src/runtime/mgc.go:178 +0x74

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-16 20:54 plan9-arm go@e62bf150 (log) 
runtime: marked free object in span 0x8f05010, elemsize=48 freeindex=140 (bad use of unsafe.Pointer? try -d=checkptr)
0x91e2000 alloc marked  
0x91e2030 alloc marked  
0x91e2060 alloc marked  
0x91e2090 alloc marked  
0x91e20c0 alloc marked  
0x91e20f0 alloc marked  
0x91e2120 alloc marked  
0x91e2150 alloc marked  
0x91e2180 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x49778d, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1023 +0x4c fp=0x3ffffac0 sp=0x3ffffaac pc=0x4160c
runtime.(*mspan).reportZombies(0x8f05010)
	/boot/workdir/go/src/runtime/mgcsweep.go:868 +0x34c fp=0x3ffffaf8 sp=0x3ffffac0 pc=0x309dc
runtime.(*sweepLocked).sweep(0x3ffffb98, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:637 +0x314 fp=0x3ffffb88 sp=0x3ffffaf8 pc=0x2f9d0
runtime.(*mcentral).uncacheSpan(0x762948, 0x8f05010)
...
runtime.gcMarkTermination({0x1, 0x17983a4f646b5ba3})
	/boot/workdir/go/src/runtime/mgc.go:1087 +0x6d4 fp=0x92f2f2c sp=0x92f2d58 pc=0x20c68
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:927 +0x388 fp=0x92f2f80 sp=0x92f2f2c pc=0x202e8
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1446 +0x3d8 fp=0x92f2fec sp=0x92f2f80 pc=0x21fe0
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x92f2fec sp=0x92f2fec pc=0x7728c
created by runtime.gcBgMarkStartWorkers in goroutine 7
	/boot/workdir/go/src/runtime/mgc.go:1234 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-11-21 20:07 plan9-arm go@cfb28175 (log) 
runtime: marked free object in span 0x8f3fd88, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x919a000 alloc marked  
0x919a018 alloc marked  
0x919a030 alloc marked  
0x919a048 alloc marked  
0x919a060 alloc marked  
0x919a078 alloc marked  
0x919a090 alloc marked  
0x919a0a8 alloc marked  
0x919a0c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 gp=0x9002800 m=3 mp=0x904e700 [running]:
runtime.throw({0x49b1cf, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1023 +0x4c fp=0x904cec0 sp=0x904ceac pc=0x41608
runtime.(*mspan).reportZombies(0x8f3fd88)
	/boot/workdir/go/src/runtime/mgcsweep.go:868 +0x34c fp=0x904cef8 sp=0x904cec0 pc=0x309d8
runtime.(*sweepLocked).sweep(0x904cfa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:642 +0xa8c fp=0x904cf88 sp=0x904cef8 pc=0x30144
runtime.sweepone()
...
	/boot/workdir/go/src/os/exec/exec.go:577 +0x50 fp=0x9236fb0 sp=0x9236f74 pc=0x11fde8
os/exec.(*Cmd).Start.func2(0x9286210)
	/boot/workdir/go/src/os/exec/exec.go:724 +0x30 fp=0x9236fe4 sp=0x9236fb0 pc=0x120a20
os/exec.(*Cmd).Start.gowrap1()
	/boot/workdir/go/src/os/exec/exec.go:736 +0x30 fp=0x9236fec sp=0x9236fe4 pc=0x1209c4
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9236fec sp=0x9236fec pc=0x773c0
created by os/exec.(*Cmd).Start in goroutine 1664
	/boot/workdir/go/src/os/exec/exec.go:723 +0x968
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install -pgo=off cmd/asm cmd/cgo cmd/compile cmd/link: exit status: 'go_bootstrap 3398: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-10-10 18:22 plan9-arm go@e7015c93 (log) 
runtime: marked free object in span 0x779068, elemsize=16 freeindex=72 (bad use of unsafe.Pointer? try -d=checkptr)
0x9016000 alloc marked  
0x9016010 alloc unmarked
0x9016020 alloc marked  
0x9016030 alloc marked  
0x9016040 alloc marked  
0x9016050 alloc marked  
0x9016060 alloc marked  
0x9016070 alloc marked  
0x9016080 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x495329, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1018 +0x4c fp=0x3ffffc3c sp=0x3ffffc28 pc=0x40fcc
runtime.(*mspan).reportZombies(0x779068)
	/boot/workdir/go/src/runtime/mgcsweep.go:861 +0x34c fp=0x3ffffc74 sp=0x3ffffc3c pc=0x303f4
runtime.(*sweepLocked).sweep(0x3ffffd14, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:644 +0xa84 fp=0x3ffffd04 sp=0x3ffffc74 pc=0x2fb60
runtime.(*mcentral).uncacheSpan(0x75c008, 0x779068)
...
runtime.gcMarkTermination()
	/boot/workdir/go/src/runtime/mgc.go:1127 +0x708 fp=0x903df4c sp=0x903dd9c pc=0x208fc
runtime.gcMarkDone()
	/boot/workdir/go/src/runtime/mgc.go:941 +0x2f4 fp=0x903df80 sp=0x903df4c pc=0x200ac
runtime.gcBgMarkWorker()
	/boot/workdir/go/src/runtime/mgc.go:1445 +0x3d8 fp=0x903dfec sp=0x903df80 pc=0x21b80
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x903dfec sp=0x903dfec pc=0x769b8
created by runtime.gcBgMarkStartWorkers in goroutine 9
	/boot/workdir/go/src/runtime/mgc.go:1237 +0x20

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-01-05 21:29 plan9-arm go@c0693f64 (log) 
runtime: marked free object in span 0xf1a330, elemsize=48 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x17d0000 alloc marked  
0x17d0030 alloc marked  
0x17d0060 alloc marked  
0x17d0090 alloc marked  
0x17d00c0 alloc marked  
0x17d00f0 alloc marked  
0x17d0120 alloc marked  
0x17d0150 alloc marked  
0x17d0180 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 gp=0x1002908 m=6 mp=0x1496008 [running]:
runtime.throw({0x690fc6, 0x1c})
	runtime/panic.go:1023 +0x4c fp=0x1048eb8 sp=0x1048ea4 pc=0x42788
runtime.(*mspan).reportZombies(0xf1a330)
	runtime/mgcsweep.go:871 +0x34c fp=0x1048ef0 sp=0x1048eb8 pc=0x31250
runtime.(*sweepLocked).sweep(0x1048fa8, 0x0)
	runtime/mgcsweep.go:642 +0xaf8 fp=0x1048f88 sp=0x1048ef0 pc=0x3092c
runtime.sweepone()
...
	cmd/go/internal/work/action.go:76 +0x3c fp=0x150fe70 sp=0x150fe54 pc=0x52555c
cmd/go/internal/work.(*Builder).Do.func3({0x77d8f0, 0xaaac08}, 0x145d448)
	cmd/go/internal/work/exec.go:151 +0x770 fp=0x150ff84 sp=0x150fe70 pc=0x5366cc
cmd/go/internal/work.(*Builder).Do.func4()
	cmd/go/internal/work/exec.go:220 +0xcc fp=0x150ffec sp=0x150ff84 pc=0x535dc8
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x150ffec sp=0x150ffec pc=0x7c0a0
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	cmd/go/internal/work/exec.go:206 +0x3a8
go tool dist: Failed: exit status: 'go 43237: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2023-12-06 20:22 plan9-arm arch@a8505704 go@5f949c4f (log) 
runtime: marked free object in span 0xe6ba90, elemsize=2688 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x1384000 free  marked   zombie
0x01384000:  0x202f2f0a  0x65646f43  0x6e656720  0x74617265 
0x01384010:  0x62206465  0x67272079  0x6574206f  0x2e277473 
0x01384020:  0x204f4420  0x20544f4e  0x54494445  0x700a0a2e 
0x01384030:  0x616b6361  0x6d206567  0x0a6e6961  0x706d690a 
0x01384040:  0x2074726f  0x22090a28  0x0a22736f  0x22090a0a 
0x01384050:  0x74736574  0x22676e69  0x7422090a  0x69747365 
0x01384060:  0x692f676e  0x7265746e  0x2f6c616e  0x74736574 
0x01384070:  0x73706564  0x0a0a0a22  0x65745f09  0x22207473 
...
fatal error: found pointer to free object

goroutine 3 gp=0x1002908 m=11 mp=0x1481908 [running]:
runtime.throw({0x690f2f, 0x1c})
	runtime/panic.go:1023 +0x4c fp=0x1044eb8 sp=0x1044ea4 pc=0x42784
runtime.(*mspan).reportZombies(0xe6ba90)
	runtime/mgcsweep.go:872 +0x34c fp=0x1044ef0 sp=0x1044eb8 pc=0x3124c
runtime.(*sweepLocked).sweep(0x1044fa8, 0x0)
	runtime/mgcsweep.go:638 +0x32c fp=0x1044f88 sp=0x1044ef0 pc=0x3015c
runtime.sweepone()
...
syscall.await({0x1a73d40, 0x200, 0x200})
	syscall/zsyscall_plan9_arm.go:45 +0x48 fp=0x1a73d24 sp=0x1a73cf8 pc=0x8fec0
syscall.Await(0x167c020)
	syscall/syscall_plan9.go:274 +0x50 fp=0x1a73f84 sp=0x1a73d24 pc=0x8f4a8
syscall.startProcess.func1()
	syscall/exec_plan9.go:517 +0x210 fp=0x1a73fec sp=0x1a73f84 pc=0x8d420
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x1a73fec sp=0x1a73fec pc=0x7c07c
created by syscall.startProcess in goroutine 1267
	syscall/exec_plan9.go:492 +0xbc

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-01-22 17:00 plan9-arm go@558919b4 (log) 
runtime: marked free object in span 0x8f92f90, elemsize=144 freeindex=6 (bad use of unsafe.Pointer? try -d=checkptr)
0x913e000 alloc marked  
0x913e090 alloc marked  
0x913e120 alloc marked  
0x913e1b0 alloc marked  
0x913e240 alloc marked  
0x913e2d0 alloc marked  
0x913e360 alloc marked  
0x913e3f0 alloc marked  
0x913e480 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x49ebd9, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1023 +0x4c fp=0x3ffffcfc sp=0x3ffffce8 pc=0x42990
runtime.(*mspan).reportZombies(0x8f92f90)
	/boot/workdir/go/src/runtime/mgcsweep.go:872 +0x34c fp=0x3ffffd34 sp=0x3ffffcfc pc=0x31590
runtime.(*sweepLocked).sweep(0x3ffffdd4, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:643 +0xa8c fp=0x3ffffdc4 sp=0x3ffffd34 pc=0x30cfc
runtime.(*mcentral).uncacheSpan(0x76d200, 0x8f92f90)
...
	/boot/workdir/go/src/cmd/go/internal/work/action.go:460 +0x34 fp=0x9733e70 sp=0x9733e54 pc=0x36f22c
cmd/go/internal/work.(*Builder).Do.func3({0x54b7dc, 0x778cf0}, 0x956ee40)
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:151 +0x770 fp=0x9733f84 sp=0x9733e70 pc=0x37df2c
cmd/go/internal/work.(*Builder).Do.func4()
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:220 +0xcc fp=0x9733fec sp=0x9733f84 pc=0x37d628
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9733fec sp=0x9733fec pc=0x78e1c
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:206 +0x3a8
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install cmd: exit status: 'go_bootstrap 8797: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-01-22 20:28 plan9-arm go@e5eeadb2 (log) 
runtime: marked free object in span 0x8f42a88, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x9380000 alloc marked  
0x9380018 alloc marked  
0x9380030 alloc marked  
0x9380048 alloc marked  
0x9380060 alloc marked  
0x9380078 alloc marked  
0x9380090 alloc marked  
0x93800a8 alloc marked  
0x93800c0 free  unmarked
...
fatal error: found pointer to free object

goroutine 3 gp=0x9002800 m=11 mp=0x96bd900 [running]:
runtime.throw({0x49eb3f, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1011 +0x4c fp=0x904eec0 sp=0x904eeac pc=0x4290c
runtime.(*mspan).reportZombies(0x8f42a88)
	/boot/workdir/go/src/runtime/mgcsweep.go:872 +0x34c fp=0x904eef8 sp=0x904eec0 pc=0x31590
runtime.(*sweepLocked).sweep(0x904efa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:643 +0xa8c fp=0x904ef88 sp=0x904eef8 pc=0x30cfc
runtime.sweepone()
...
	/boot/workdir/go/src/os/exec/exec.go:577 +0x50 fp=0x9705fb4 sp=0x9705f78 pc=0x121914
os/exec.(*Cmd).Start.func2(0x96be920)
	/boot/workdir/go/src/os/exec/exec.go:724 +0x30 fp=0x9705fe4 sp=0x9705fb4 pc=0x12254c
os/exec.(*Cmd).Start.gowrap1()
	/boot/workdir/go/src/os/exec/exec.go:736 +0x30 fp=0x9705fec sp=0x9705fe4 pc=0x1224f0
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9705fec sp=0x9705fec pc=0x78d98
created by os/exec.(*Cmd).Start in goroutine 5028
	/boot/workdir/go/src/os/exec/exec.go:723 +0x968
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install cmd: exit status: 'go_bootstrap 8853: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-01-23 17:20 plan9-arm go@ed18d85a (log) 
runtime: marked free object in span 0xf036b0, elemsize=80 freeindex=31 (bad use of unsafe.Pointer? try -d=checkptr)
0x142e000 alloc marked  
0x142e050 alloc marked  
0x142e0a0 alloc marked  
0x142e0f0 alloc marked  
0x142e140 alloc marked  
0x142e190 alloc marked  
0x142e1e0 alloc marked  
0x142e230 alloc marked  
0x142e280 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x690fef, 0x1c})
	runtime/panic.go:1011 +0x4c fp=0x3ffff9f0 sp=0x3ffff9dc pc=0x426e0
runtime.(*mspan).reportZombies(0xf036b0)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffa28 sp=0x3ffff9f0 pc=0x3122c
runtime.(*sweepLocked).sweep(0x3ffffad0, 0x0)
	runtime/mgcsweep.go:643 +0xaf8 fp=0x3ffffac0 sp=0x3ffffa28 pc=0x30908
runtime.(*mcentral).uncacheSpan(0xa84b88, 0xf036b0)
...
	runtime/lock_sema.go:296 +0x24 fp=0x13a7fc8 sp=0x13a7fa4 pc=0xf55c
os/signal.signal_recv()
	runtime/sigqueue_plan9.go:110 +0x74 fp=0x13a7fdc sp=0x13a7fc8 pc=0x79a6c
os/signal.loop()
	os/signal/signal_plan9.go:27 +0x14 fp=0x13a7fec sp=0x13a7fdc pc=0x1ce168
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x13a7fec sp=0x13a7fec pc=0x7bfbc
created by os/signal.Notify.func1.1 in goroutine 1109
	os/signal/signal.go:151 +0x28
go tool dist: Failed: exit status: 'go 73182: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-01-25 22:04 plan9-arm go@93f0c0b2 (log) 
runtime: marked free object in span 0xf02990, elemsize=96 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x142e000 free  unmarked
0x142e060 free  unmarked
0x142e0c0 free  unmarked
0x142e120 free  unmarked
0x142e180 free  unmarked
0x142e1e0 alloc marked  
0x142e240 alloc marked  
0x142e2a0 free  unmarked
0x142e300 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 gp=0x1002908 m=13 mp=0x104b908 [running]:
runtime.throw({0x691322, 0x1c})
	runtime/panic.go:1011 +0x4c fp=0x1048eb8 sp=0x1048ea4 pc=0x426e0
runtime.(*mspan).reportZombies(0xf02990)
	runtime/mgcsweep.go:872 +0x34c fp=0x1048ef0 sp=0x1048eb8 pc=0x3122c
runtime.(*sweepLocked).sweep(0x1048fa8, 0x0)
	runtime/mgcsweep.go:643 +0xaf8 fp=0x1048f88 sp=0x1048ef0 pc=0x30908
runtime.sweepone()
...
	os/exec/exec.go:577 +0x50 fp=0x12b0fb4 sp=0x12b0f78 pc=0x12c368
os/exec.(*Cmd).Start.func2(0x141c1f0)
	os/exec/exec.go:724 +0x30 fp=0x12b0fe4 sp=0x12b0fb4 pc=0x12cfa0
os/exec.(*Cmd).Start.gowrap1()
	os/exec/exec.go:736 +0x30 fp=0x12b0fec sp=0x12b0fe4 pc=0x12cf44
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x12b0fec sp=0x12b0fec pc=0x7bfbc
created by os/exec.(*Cmd).Start in goroutine 411
	os/exec/exec.go:723 +0x968
go tool dist: Failed: exit status: 'go 46484: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-01-27 13:31 plan9-arm go@f719d5cf (log) 
runtime: marked free object in span 0xac0018, elemsize=24 freeindex=95 (bad use of unsafe.Pointer? try -d=checkptr)
0x119e000 alloc marked  
0x119e018 alloc marked  
0x119e030 alloc marked  
0x119e048 alloc marked  
0x119e060 alloc marked  
0x119e078 alloc marked  
0x119e090 alloc marked  
0x119e0a8 alloc marked  
0x119e0c0 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x691392, 0x1c})
	runtime/panic.go:1011 +0x4c fp=0x3ffffa74 sp=0x3ffffa60 pc=0x42848
runtime.(*mspan).reportZombies(0xac0018)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffaac sp=0x3ffffa74 pc=0x31394
runtime.(*sweepLocked).sweep(0x3ffffb54, 0x0)
	runtime/mgcsweep.go:643 +0xaf8 fp=0x3ffffb44 sp=0x3ffffaac pc=0x30a70
runtime.(*mcentral).uncacheSpan(0xa85790, 0xac0018)
...
	cmd/go/internal/work/action.go:460 +0x34 fp=0x1237e70 sp=0x1237e54 pc=0x527a54
cmd/go/internal/work.(*Builder).Do.func3({0x77dcb8, 0xaa9c10}, 0x10bd8c8)
	cmd/go/internal/work/exec.go:151 +0x770 fp=0x1237f84 sp=0x1237e70 pc=0x536754
cmd/go/internal/work.(*Builder).Do.func4()
	cmd/go/internal/work/exec.go:220 +0xcc fp=0x1237fec sp=0x1237f84 pc=0x535e50
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x1237fec sp=0x1237fec pc=0x7c124
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	cmd/go/internal/work/exec.go:206 +0x3a8
go tool dist: Failed: exit status: 'go 29796: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-02-01 19:34 plan9-arm go@3b0d39c5 (log) 
runtime: marked free object in span 0x8f27220, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x91c0000 alloc marked  
0x91c0018 alloc marked  
0x91c0030 free  unmarked
0x91c0048 alloc marked  
0x91c0060 alloc marked  
0x91c0078 alloc marked  
0x91c0090 alloc marked  
0x91c00a8 alloc marked  
0x91c00c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 gp=0x9002800 m=7 mp=0x9180a00 [running]:
runtime.throw({0x49fbb2, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1011 +0x4c fp=0x904cec0 sp=0x904ceac pc=0x42a0c
runtime.(*mspan).reportZombies(0x8f27220)
	/boot/workdir/go/src/runtime/mgcsweep.go:872 +0x34c fp=0x904cef8 sp=0x904cec0 pc=0x31690
runtime.(*sweepLocked).sweep(0x904cfa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:643 +0xa8c fp=0x904cf88 sp=0x904cef8 pc=0x30dfc
runtime.sweepone()
...
	/boot/workdir/go/src/os/exec/exec.go:577 +0x50 fp=0x9461fb4 sp=0x9461f78 pc=0x1258c8
os/exec.(*Cmd).Start.func2(0x9104360)
	/boot/workdir/go/src/os/exec/exec.go:724 +0x30 fp=0x9461fe4 sp=0x9461fb4 pc=0x126500
os/exec.(*Cmd).Start.gowrap1()
	/boot/workdir/go/src/os/exec/exec.go:736 +0x30 fp=0x9461fec sp=0x9461fe4 pc=0x1264a4
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:859 +0x4 fp=0x9461fec sp=0x9461fec pc=0x78f9c
created by os/exec.(*Cmd).Start in goroutine 1737
	/boot/workdir/go/src/os/exec/exec.go:723 +0x968
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install -pgo=off cmd/asm cmd/cgo cmd/compile cmd/link: exit status: 'go_bootstrap 3378: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-02-21 21:23 plan9-arm go@4cd743e2 (log) 
runtime: marked free object in span 0xf10e30, elemsize=192 freeindex=7 (bad use of unsafe.Pointer? try -d=checkptr)
0x1100000 alloc marked  
0x11000c0 alloc marked  
0x1100180 alloc marked  
0x1100240 alloc marked  
0x1100300 alloc marked  
0x11003c0 alloc marked  
0x1100480 alloc marked  
0x1100540 alloc marked  
0x1100600 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x69350b, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x3ffffb84 sp=0x3ffffb70 pc=0x42820
runtime.(*mspan).reportZombies(0xf10e30)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffbbc sp=0x3ffffb84 pc=0x31344
runtime.(*sweepLocked).sweep(0x3ffffc64, 0x0)
	runtime/mgcsweep.go:643 +0xaf8 fp=0x3ffffc54 sp=0x3ffffbbc pc=0x30a20
runtime.(*mcentral).uncacheSpan(0xa892c8, 0xf10e30)
...
	syscall/zsyscall_plan9_arm.go:45 +0x48 fp=0x1631d24 sp=0x1631cf8 pc=0x905c4
syscall.Await(0x11879a0)
	syscall/syscall_plan9.go:274 +0x50 fp=0x1631f84 sp=0x1631d24 pc=0x8fbac
syscall.startProcess.func1()
	syscall/exec_plan9.go:517 +0x210 fp=0x1631fec sp=0x1631f84 pc=0x8db24
runtime.goexit({})
	runtime/asm_arm.s:859 +0x4 fp=0x1631fec sp=0x1631fec pc=0x7c49c
created by syscall.startProcess in goroutine 298
	syscall/exec_plan9.go:492 +0xbc
go tool dist: Failed: exit status: 'go 31349: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-02-27 20:11 plan9-arm go@234390e7 (log) 
runtime: marked free object in span 0xf01ef0, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x1406000 alloc marked  
0x1406018 alloc marked  
0x1406030 free  unmarked
0x1406048 alloc marked  
0x1406060 free  unmarked
0x1406078 alloc marked  
0x1406090 alloc marked  
0x14060a8 alloc marked  
0x14060c0 free  unmarked
...
fatal error: found pointer to free object

goroutine 3 gp=0x1002908 m=7 mp=0x14dc508 [running]:
runtime.throw({0x693c64, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x1048eb8 sp=0x1048ea4 pc=0x42820
runtime.(*mspan).reportZombies(0xf01ef0)
	runtime/mgcsweep.go:872 +0x34c fp=0x1048ef0 sp=0x1048eb8 pc=0x31344
runtime.(*sweepLocked).sweep(0x1048fa8, 0x0)
	runtime/mgcsweep.go:643 +0xaf8 fp=0x1048f88 sp=0x1048ef0 pc=0x30a20
runtime.sweepone()
...
	os/exec/exec.go:577 +0x21 fp=0x1519fb4 sp=0x1519f78 pc=0x1306bd
os/exec.(*Cmd).Start.func2(0x10fa3e0)
	os/exec/exec.go:724 +0x30 fp=0x1519fe4 sp=0x1519fb4 pc=0x131324
os/exec.(*Cmd).Start.gowrap1()
	os/exec/exec.go:736 +0x30 fp=0x1519fec sp=0x1519fe4 pc=0x1312c8
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x1519fec sp=0x1519fec pc=0x7c6dc
created by os/exec.(*Cmd).Start in goroutine 430
	os/exec/exec.go:723 +0x968
go tool dist: Failed: exit status: 'go 13840: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-04 17:34 plan9-arm go@de487d56 (log) 
runtime: marked free object in span 0x8f4f520, elemsize=32 freeindex=25 (bad use of unsafe.Pointer? try -d=checkptr)
0x90f8000 alloc unmarked
0x90f8020 alloc marked  
0x90f8040 alloc marked  
0x90f8060 alloc marked  
0x90f8080 alloc marked  
0x90f80a0 alloc marked  
0x90f80c0 alloc marked  
0x90f80e0 alloc marked  
0x90f8100 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x4a07de, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1021 +0x4c fp=0x3ffffb3c sp=0x3ffffb28 pc=0x4243c
runtime.(*mspan).reportZombies(0x8f4f520)
	/boot/workdir/go/src/runtime/mgcsweep.go:872 +0x34c fp=0x3ffffb74 sp=0x3ffffb3c pc=0x310c0
runtime.(*sweepLocked).sweep(0x3ffffc14, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:638 +0x314 fp=0x3ffffc04 sp=0x3ffffb74 pc=0x300b4
runtime.(*mcentral).uncacheSpan(0x76eb20, 0x8f4f520)
...
	/boot/workdir/go/src/syscall/zsyscall_plan9_arm.go:45 +0x48 fp=0x988bd24 sp=0x988bcf8 pc=0x8bf4c
syscall.Await(0x93d2240)
	/boot/workdir/go/src/syscall/syscall_plan9.go:274 +0x50 fp=0x988bf84 sp=0x988bd24 pc=0x8b534
syscall.startProcess.func1()
	/boot/workdir/go/src/syscall/exec_plan9.go:517 +0x210 fp=0x988bfec sp=0x988bf84 pc=0x894ac
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:884 +0x4 fp=0x988bfec sp=0x988bfec pc=0x77ecc
created by syscall.startProcess in goroutine 2171
	/boot/workdir/go/src/syscall/exec_plan9.go:492 +0xbc
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install std: exit status: 'go_bootstrap 6975: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-04 17:29 plan9-arm go@8a57cc8e (log) 
runtime: marked free object in span 0x8f6d960, elemsize=24 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x9224000 alloc marked  
0x9224018 alloc marked  
0x9224030 alloc marked  
0x9224048 alloc marked  
0x9224060 alloc marked  
0x9224078 alloc marked  
0x9224090 alloc marked  
0x92240a8 alloc marked  
0x92240c0 alloc marked  
...
fatal error: found pointer to free object

goroutine 3 gp=0x9002800 m=8 mp=0x904f400 [running]:
runtime.throw({0x4a07c6, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1021 +0x4c fp=0x904cec0 sp=0x904ceac pc=0x4243c
runtime.(*mspan).reportZombies(0x8f6d960)
	/boot/workdir/go/src/runtime/mgcsweep.go:872 +0x34c fp=0x904cef8 sp=0x904cec0 pc=0x310c0
runtime.(*sweepLocked).sweep(0x904cfa8, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:643 +0xa8c fp=0x904cf88 sp=0x904cef8 pc=0x3082c
runtime.sweepone()
...
	/boot/workdir/go/src/syscall/zsyscall_plan9_arm.go:45 +0x48 fp=0x986fd24 sp=0x986fcf8 pc=0x8bf48
syscall.Await(0x94140a0)
	/boot/workdir/go/src/syscall/syscall_plan9.go:274 +0x50 fp=0x986ff84 sp=0x986fd24 pc=0x8b530
syscall.startProcess.func1()
	/boot/workdir/go/src/syscall/exec_plan9.go:517 +0x210 fp=0x986ffec sp=0x986ff84 pc=0x894a8
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:884 +0x4 fp=0x986ffec sp=0x986ffec pc=0x77ecc
created by syscall.startProcess in goroutine 691
	/boot/workdir/go/src/syscall/exec_plan9.go:492 +0xbc
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install -a cmd/asm cmd/cgo cmd/compile cmd/link: exit status: 'go_bootstrap 4895: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-07 16:46 plan9-arm go@da5871d5 (log) 
runtime: marked free object in span 0x78fdf8, elemsize=112 freeindex=72 (bad use of unsafe.Pointer? try -d=checkptr)
0x92c4000 alloc marked  
0x92c4070 alloc marked  
0x92c40e0 alloc marked  
0x92c4150 alloc marked  
0x92c41c0 alloc marked  
0x92c4230 alloc marked  
0x92c42a0 alloc marked  
0x92c4310 alloc marked  
0x92c4380 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x4a1560, 0x1c})
	/boot/workdir/go/src/runtime/panic.go:1021 +0x4c fp=0x3ffffb44 sp=0x3ffffb30 pc=0x4243c
runtime.(*mspan).reportZombies(0x78fdf8)
	/boot/workdir/go/src/runtime/mgcsweep.go:872 +0x34c fp=0x3ffffb7c sp=0x3ffffb44 pc=0x310c0
runtime.(*sweepLocked).sweep(0x3ffffc1c, 0x0)
	/boot/workdir/go/src/runtime/mgcsweep.go:638 +0x314 fp=0x3ffffc0c sp=0x3ffffb7c pc=0x300b4
runtime.(*mcentral).uncacheSpan(0x770070, 0x78fdf8)
...
	/boot/workdir/go/src/cmd/go/internal/work/action.go:460 +0x34 fp=0x9b43e74 sp=0x9b43e58 pc=0x370ae4
cmd/go/internal/work.(*Builder).Do.func3({0x54e034, 0x77bd60}, 0x90c0d80)
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:151 +0x770 fp=0x9b43f84 sp=0x9b43e74 pc=0x37f6e4
cmd/go/internal/work.(*Builder).Do.func4()
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:220 +0xcc fp=0x9b43fec sp=0x9b43f84 pc=0x37ede0
runtime.goexit({})
	/boot/workdir/go/src/runtime/asm_arm.s:884 +0x4 fp=0x9b43fec sp=0x9b43fec pc=0x77ecc
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	/boot/workdir/go/src/cmd/go/internal/work/exec.go:206 +0x3a8
go tool dist: FAILED: /boot/workdir/go/pkg/tool/plan9_arm/go_bootstrap install cmd: exit status: 'go_bootstrap 8782: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-08 22:13 plan9-arm go@33661718 (log) 
runtime: marked free object in span 0xf019a8, elemsize=32 freeindex=61 (bad use of unsafe.Pointer? try -d=checkptr)
0x1414000 alloc marked  
0x1414020 alloc marked  
0x1414040 alloc unmarked
0x1414060 alloc marked  
0x1414080 alloc marked  
0x14140a0 alloc marked  
0x14140c0 alloc unmarked
0x14140e0 alloc marked  
0x1414100 alloc unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6a10ab, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x3ffffca4 sp=0x3ffffc90 pc=0x42c7c
runtime.(*mspan).reportZombies(0xf019a8)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffcdc sp=0x3ffffca4 pc=0x31688
runtime.(*sweepLocked).sweep(0x3ffffd84, 0x0)
	runtime/mgcsweep.go:643 +0xb14 fp=0x3ffffd74 sp=0x3ffffcdc pc=0x30d64
runtime.(*mcentral).uncacheSpan(0xaa0b10, 0xf019a8)
...
	os/exec/exec.go:577 +0x21 fp=0x13a1fb4 sp=0x13a1f78 pc=0x132279
os/exec.(*Cmd).Start.func2(0x133e7a0)
	os/exec/exec.go:724 +0x30 fp=0x13a1fe4 sp=0x13a1fb4 pc=0x132ee0
os/exec.(*Cmd).Start.gowrap1()
	os/exec/exec.go:736 +0x30 fp=0x13a1fec sp=0x13a1fe4 pc=0x132e84
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x13a1fec sp=0x13a1fec pc=0x7c3ec
created by os/exec.(*Cmd).Start in goroutine 500
	os/exec/exec.go:723 +0x968
go tool dist: Failed: exit status: 'go 19564: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-11 17:11 plan9-arm go@ec4baaca (log) 
runtime: marked free object in span 0xadb978, elemsize=48 freeindex=48 (bad use of unsafe.Pointer? try -d=checkptr)
0x14e0000 alloc unmarked
0x14e0030 alloc unmarked
0x14e0060 alloc unmarked
0x14e0090 alloc unmarked
0x14e00c0 alloc unmarked
0x14e00f0 alloc unmarked
0x14e0120 alloc unmarked
0x14e0150 alloc unmarked
0x14e0180 alloc unmarked
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6a119a, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x3ffffb44 sp=0x3ffffb30 pc=0x42c9c
runtime.(*mspan).reportZombies(0xadb978)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffb7c sp=0x3ffffb44 pc=0x316a8
runtime.(*sweepLocked).sweep(0x3ffffc24, 0x0)
	runtime/mgcsweep.go:643 +0xb14 fp=0x3ffffc14 sp=0x3ffffb7c pc=0x30d84
runtime.(*mcentral).uncacheSpan(0xaa0b80, 0xadb978)
...
	cmd/go/internal/work/action.go:460 +0x34 fp=0x115be9c sp=0x115be80 pc=0x530b24
cmd/go/internal/work.(*Builder).Do.func3({0x78f430, 0xac4e08}, 0x1505208)
	cmd/go/internal/work/exec.go:152 +0x778 fp=0x115bf84 sp=0x115be9c pc=0x53f72c
cmd/go/internal/work.(*Builder).Do.func4()
	cmd/go/internal/work/exec.go:221 +0xcc fp=0x115bfec sp=0x115bf84 pc=0x53ee20
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x115bfec sp=0x115bfec pc=0x7c4b8
created by cmd/go/internal/work.(*Builder).Do in goroutine 1
	cmd/go/internal/work/exec.go:207 +0x3a8
go tool dist: Failed: exit status: 'go 17752: 2'

— watchflakes

@gopherbot
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Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-13 20:57 plan9-arm go@74a0e316 (log) 
runtime: marked free object in span 0xf35750, elemsize=1152 freeindex=5 (bad use of unsafe.Pointer? try -d=checkptr)
0x15f6000 alloc marked  
0x15f6480 alloc marked  
0x15f6900 alloc marked  
0x15f6d80 alloc marked  
0x15f7200 alloc marked  
0x15f7680 free  marked   zombie
0x015f7680:  0x00643430  0x00000000  0x3e688d95  0xf960bd6c 
0x015f7690:  0x012ce977  0x00000005  0x01019c68  0x00000006 
0x015f76a0:  0x010fa9f0  0x0000000b  0x01221e60  0x0000000d 
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6a14ba, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x3ffffa10 sp=0x3ffff9fc pc=0x42c84
runtime.(*mspan).reportZombies(0xf35750)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffa48 sp=0x3ffffa10 pc=0x31690
runtime.(*sweepLocked).sweep(0x3ffffaf0, 0x0)
	runtime/mgcsweep.go:638 +0x360 fp=0x3ffffae0 sp=0x3ffffa48 pc=0x305b8
runtime.(*mcentral).uncacheSpan(0xaa2798, 0xf35750)
...
syscall.Await(0x168ba00)
	syscall/syscall_plan9.go:274 +0x50 fp=0x19ddf84 sp=0x19ddd24 pc=0x8f9c4
syscall.startProcess.func1()
	syscall/exec_plan9.go:517 +0x210 fp=0x19ddfec sp=0x19ddf84 pc=0x8d93c
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x19ddfec sp=0x19ddfec pc=0x7c250
created by syscall.startProcess in goroutine 1259
	syscall/exec_plan9.go:492 +0xbc
2024/03/13 23:13:36 Failed: exit status: 'go 78121: 2'
go tool dist: FAILED

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-18 18:59 plan9-arm go@dc6a5cfc (log) 
runtime: marked free object in span 0xf40bc8, elemsize=16 freeindex=34 (bad use of unsafe.Pointer? try -d=checkptr)
0x1344000 alloc unmarked
0x1344010 alloc unmarked
0x1344020 alloc unmarked
0x1344030 alloc marked  
0x1344040 alloc marked  
0x1344050 alloc marked  
0x1344060 alloc marked  
0x1344070 alloc marked  
0x1344080 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6a3c20, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x3ffffb00 sp=0x3ffffaec pc=0x42ee8
runtime.(*mspan).reportZombies(0xf40bc8)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffb38 sp=0x3ffffb00 pc=0x318f4
runtime.(*sweepLocked).sweep(0x3ffffbe0, 0x0)
	runtime/mgcsweep.go:643 +0xb14 fp=0x3ffffbd0 sp=0x3ffffb38 pc=0x30fd0
runtime.(*mcentral).uncacheSpan(0xaa4920, 0xf40bc8)
...
	syscall/zsyscall_plan9_arm.go:45 +0x48 fp=0x16add24 sp=0x16adcf8 pc=0xd50e0
syscall.Await(0x143c920)
	syscall/syscall_plan9.go:274 +0x50 fp=0x16adf84 sp=0x16add24 pc=0xd46c8
syscall.startProcess.func1()
	syscall/exec_plan9.go:517 +0x210 fp=0x16adfec sp=0x16adf84 pc=0xd2640
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x16adfec sp=0x16adfec pc=0x7cfd4
created by syscall.startProcess in goroutine 404
	syscall/exec_plan9.go:492 +0xbc
go tool dist: Failed: exit status: 'go 46395: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-26 02:22 plan9-arm go@3659b875 (log) 
runtime: marked free object in span 0xae9418, elemsize=32 freeindex=124 (bad use of unsafe.Pointer? try -d=checkptr)
0x13fe000 alloc marked  
0x13fe020 alloc marked  
0x13fe040 alloc marked  
0x13fe060 alloc marked  
0x13fe080 alloc marked  
0x13fe0a0 alloc marked  
0x13fe0c0 alloc marked  
0x13fe0e0 alloc marked  
0x13fe100 alloc marked  
...
fatal error: found pointer to free object

runtime stack:
runtime.throw({0x6ab4e1, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x3ffffb58 sp=0x3ffffb44 pc=0x421f0
runtime.(*mspan).reportZombies(0xae9418)
	runtime/mgcsweep.go:872 +0x34c fp=0x3ffffb90 sp=0x3ffffb58 pc=0x30bfc
runtime.(*sweepLocked).sweep(0x3ffffc38, 0x0)
	runtime/mgcsweep.go:638 +0x360 fp=0x3ffffc28 sp=0x3ffffb90 pc=0x2fb24
runtime.(*mcentral).uncacheSpan(0xaafb38, 0xae9418)
...
	os/exec/exec.go:577 +0x50 fp=0x12c1fb4 sp=0x12c1f78 pc=0x12f620
os/exec.(*Cmd).Start.func2(0x119c910)
	os/exec/exec.go:724 +0x30 fp=0x12c1fe4 sp=0x12c1fb4 pc=0x130258
os/exec.(*Cmd).Start.gowrap1()
	os/exec/exec.go:736 +0x30 fp=0x12c1fec sp=0x12c1fe4 pc=0x1301fc
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x12c1fec sp=0x12c1fec pc=0x7c3b0
created by os/exec.(*Cmd).Start in goroutine 872
	os/exec/exec.go:723 +0x968
go tool dist: Failed: exit status: 'go 44174: 2'

— watchflakes

@gopherbot
Copy link

Found new dashboard test flakes for:

#!watchflakes
post <- builder == "plan9-arm" && `found pointer to free object`
2024-03-29 23:09 plan9-arm go@89f7805c (log) 
runtime: marked free object in span 0xec2890, elemsize=48 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)
0x1208000 alloc marked  
0x1208030 free  unmarked
0x1208060 free  unmarked
0x1208090 alloc marked  
0x12080c0 alloc marked  
0x12080f0 free  marked   zombie
0x012080f0:  0x6f6f622f  0x6f772f74  0x69646b72  0x6f672f72 
0x01208100:  0x6372732f  0x7365742f  0x676e6974  0x6c6c612f 
0x01208110:  0x2e73636f  0x37626f67  0x0000006e  0x00000000 
...
fatal error: found pointer to free object

goroutine 3 gp=0x1002908 m=8 mp=0x137e508 [running]:
runtime.throw({0x6afa95, 0x1c})
	runtime/panic.go:1021 +0x4c fp=0x1048eb8 sp=0x1048ea4 pc=0x421f8
runtime.(*mspan).reportZombies(0xec2890)
	runtime/mgcsweep.go:872 +0x34c fp=0x1048ef0 sp=0x1048eb8 pc=0x30c04
runtime.(*sweepLocked).sweep(0x1048fa8, 0x0)
	runtime/mgcsweep.go:638 +0x360 fp=0x1048f88 sp=0x1048ef0 pc=0x2fb2c
runtime.sweepone()
...
	syscall/zsyscall_plan9_arm.go:45 +0x48 fp=0x1665d24 sp=0x1665cf8 pc=0xd54d0
syscall.Await(0x13b6680)
	syscall/syscall_plan9.go:274 +0x50 fp=0x1665f84 sp=0x1665d24 pc=0xd4ab8
syscall.startProcess.func1()
	syscall/exec_plan9.go:517 +0x210 fp=0x1665fec sp=0x1665f84 pc=0xd2a30
runtime.goexit({})
	runtime/asm_arm.s:884 +0x4 fp=0x1665fec sp=0x1665fec pc=0x7c6d4
created by syscall.startProcess in goroutine 531
	syscall/exec_plan9.go:492 +0xbc
go tool dist: Failed: exit status: 'go 47628: 2'

— watchflakes

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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Plan9
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@prattmic @gopherbot