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cmd/compile/internal/typecheck: nil panic in (*intWriter).uint64 on windows-amd64-race #52041

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bcmills opened this issue Mar 30, 2022 · 3 comments
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cmd/compile/internal/typecheck: nil panic in (*intWriter).uint64 on windows-amd64-race #52041

bcmills opened this issue Mar 30, 2022 · 3 comments
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FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided.
Milestone
Go1.19

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@bcmills
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bcmills commented Mar 30, 2022 •
edited 

# golang.org/x/perf/storage/query [golang.org/x/perf/storage/query.test]
<autogenerated>:1: internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference

goroutine 1 [running]:
runtime/debug.Stack()
	C:/workdir/go/src/runtime/debug/stack.go:24 +0x65
cmd/compile/internal/base.FatalfAt({0x127280?, 0xc0?}, {0x19dd579, 0x9}, {0xc000127288, 0x1, 0x1})
	C:/workdir/go/src/cmd/compile/internal/base/print.go:227 +0x1d7
cmd/compile/internal/base.Fatalf(...)
	C:/workdir/go/src/cmd/compile/internal/base/print.go:196
cmd/compile/internal/gc.handlePanic()
	C:/workdir/go/src/cmd/compile/internal/gc/main.go:48 +0x85
panic({0x1968200, 0x1fc5ef0})
	C:/workdir/go/src/runtime/panic.go:838 +0x207
bytes.(*Buffer).Write(0xc0003742d0?, {0xc000127466?, 0xc000000076?, 0x2?})
	C:/workdir/go/src/bytes/buffer.go:172 +0xb5
cmd/compile/internal/typecheck.(*intWriter).uint64(0x2030002?, 0x30002?)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:2295 +0x71
cmd/compile/internal/typecheck.(*exportWriter).startType(...)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:946
cmd/compile/internal/typecheck.(*exportWriter).doTyp(0xc0008ea2a0, 0xc0004c6e70)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:991 +0x6b2
cmd/compile/internal/typecheck.(*iexporter).typOff(0xc0001794a0, 0xc0004c6e70)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:934 +0x88
cmd/compile/internal/typecheck.(*exportWriter).typ(0xc0008ea230, 0xc000408b90?)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:781 +0x25
cmd/compile/internal/typecheck.(*exportWriter).doTyp(0xc0008ea230, 0xc00045fc70)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:1033 +0x778
cmd/compile/internal/typecheck.(*iexporter).typOff(0xc0001794a0, 0xc00045fc70)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:934 +0x88
cmd/compile/internal/typecheck.(*exportWriter).typ(0xc0008ea1c0, 0xc000408554?)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:781 +0x25
cmd/compile/internal/typecheck.(*iexporter).doDecl(0xc0001794a0, 0xc0003f8480)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:614 +0x4ce
cmd/compile/internal/typecheck.WriteExports({0x1b4f100, 0xc0008e25a0}, 0x1)
	C:/workdir/go/src/cmd/compile/internal/typecheck/iexport.go:334 +0x2f0
cmd/compile/internal/noder.WriteExports(0xc000691650)
	C:/workdir/go/src/cmd/compile/internal/noder/export.go:40 +0x7a
cmd/compile/internal/gc.dumpCompilerObj(0xc000691650?)
	C:/workdir/go/src/cmd/compile/internal/gc/obj.go:107 +0x28
cmd/compile/internal/gc.dumpobj1({0xc000028140, 0x44}, 0x3)
	C:/workdir/go/src/cmd/compile/internal/gc/obj.go:63 +0x17b
cmd/compile/internal/gc.dumpobj()
	C:/workdir/go/src/cmd/compile/internal/gc/obj.go:44 +0x36
cmd/compile/internal/gc.Main(0x1a0e220)
	C:/workdir/go/src/cmd/compile/internal/gc/main.go:318 +0x1105
main.main()
	C:/workdir/go/src/cmd/compile/main.go:55 +0xdd

greplogs --dashboard -md -l -e '(?ms)internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference(?:.*\n)*cmd/compile/internal/typecheck\.\(\*exportWriter' --since=2022-01-01

2022-03-18T12:07:27-96728ec-12eca21/windows-amd64-race
@bcmills
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bcmills commented Mar 30, 2022

Marking as release-blocker for Go 1.19 because windows/amd64 is a first class port.

(CC @cuonglm, @mdempsky, @randall77)

@bcmills bcmills added NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. release-blocker labels Mar 30, 2022
@bcmills bcmills added this to the Go1.19 milestone Mar 30, 2022
@mdempsky
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This was a one time flake, right?

I don't think there's anything wrong with the iexport.go code in the stack trace. I think there must be some memory corruption going on.

@bcmills bcmills added WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. and removed release-blocker labels Apr 12, 2022
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Timed out in state WaitingForInfo. Closing.

(I am just a bot, though. Please speak up if this is a mistake or you have the requested information.)

@golang golang locked and limited conversation to collaborators May 12, 2023
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