Comment 1:

Labels changed: added priority-asap, go1.1, removed priority-triage.

Comment 2:

Does the issue occur if you put "GOGC=off GOMAXPROCS=45 ./time.test" in the script?

Comment 3:

testing now

Comment 4:

To make it clear, it happens only on 386, right? amd64 is not affected?

Comment 5:

I've never seen this on amd64. I've done about 6000 builds on amd64.
I found this within 20 builds on 386.
So I'd say that amd64 isn't affected, but I'll specifically run the time tests for a
while.

Comment 6:

I've been running the time tests on 386 for about 2 hours with GOGC=off and haven't seen
a crash yet. I'll keep it running. Seems likely that it's GC related though.

Comment 7:

I've also seen timeouts of runtime tests TestGoexitDeadlock and TestInitDeadlock.

Comment 8:

I've also seen timeouts of runtime tests TestGoexitDeadlock and TestInitDeadlock.

Comment 9:

Okay, so far I've seen the following:
linux/386: issue #5005, net/http tests failing, never seen this on amd64
linux/386: issue #5007, time tests failing if GC is enabled, works if GC is disabled,
tried to reproduce on amd64 but it seems fine there
linux/386 and linux/amd64: go test -v -cpu 1,2,4 -timeout=30m runtime tests timing out.
so far I've seen TestGoexitDeadlock and TestInitDeadlock on 386 and TestLockedDeadlock2
on amd64 time out
linux/386: I can reproduce the problem in issue #4869
linux/386 and linux/amd64: issue #4987: os/signal.TestSignal failures on both
architectures. I've only been able to reproduce this on one machine though, so I don't
know if it's the machine or the kernel maybe. strace looks sane though.
Here's a stacktrace for the runtime test deadlock on amd64:
go version devel +80a76d7f37a1 Fri Mar 08 16:39:54 2013 -0800 linux/amd64
=== RUN TestLockedDeadlock2
panic: test timed out
goroutine 77 [running]:
testing.alarm()
    /build/go.tip/go/src/pkg/testing/testing.go:526 +0x53
created by time.goFunc
    /build/go.tip/go/src/pkg/time/sleep.go:122 +0x48
goroutine 1 [chan receive]:
testing.RunTests(0x6359e0, 0x74bac0, 0x22, 0x22, 0x1, ...)
    /build/go.tip/go/src/pkg/testing/testing.go:427 +0x88e
testing.Main(0x6359e0, 0x74bac0, 0x22, 0x22, 0x74d540, ...)
    /build/go.tip/go/src/pkg/testing/testing.go:358 +0x8a
main.main()
    runtime/_test/_testmain.go:251 +0x9a
goroutine 58 [syscall]:
syscall.Syscall6()
    /build/go.tip/go/src/pkg/syscall/asm_linux_amd64.s:41 +0x5
syscall.wait4(0x431f, 0xc200000b40, 0x0, 0xc200123e10, 0x100000001, ...)
    /build/go.tip/go/src/pkg/syscall/zerrors_linux_amd64.go:1640 +0x7b
syscall.Wait4(0x431f, 0x7f650072ab44, 0x0, 0xc200123e10, 0xc20012be70, ...)
    /build/go.tip/go/src/pkg/syscall/syscall_linux.go:222 +0x6c
os.(*Process).wait(0xc20012fee0, 0x0, 0x0, 0x0)
    /build/go.tip/go/src/pkg/os/exec_unix.go:22 +0xea
os.(*Process).Wait(0xc20012fee0, 0xc200000ab8, 0x0, 0x0)
    /build/go.tip/go/src/pkg/os/doc.go:43 +0x25
os/exec.(*Cmd).Wait(0xc200134140, 0x0, 0x0)
    /build/go.tip/go/src/pkg/os/exec/exec.go:308 +0x197
os/exec.(*Cmd).Run(0xc200134140, 0xc20012a540, 0xc20012be70)
    /build/go.tip/go/src/pkg/os/exec/exec.go:232 +0x52
os/exec.(*Cmd).CombinedOutput(0xc200134140, 0x2, 0x7f650072adc0, 0x2, 0x2, ...)
    /build/go.tip/go/src/pkg/os/exec/exec.go:352 +0x20d
runtime_test.executeTest(0xc200123b40, 0x63b130, 0x9c, 0x0, 0x0, ...)
    /build/go.tip/go/src/pkg/runtime/crash_test.go:40 +0x61f
runtime_test.testDeadlock(0xc200123b40, 0x63b130, 0x9c)
    /build/go.tip/go/src/pkg/runtime/crash_test.go:71 +0x56
runtime_test.TestLockedDeadlock2(0xc200123b40)
    /build/go.tip/go/src/pkg/runtime/crash_test.go:91 +0x39
testing.tRunner(0xc200123b40, 0x74bbc8)
    /build/go.tip/go/src/pkg/testing/testing.go:346 +0x8a
created by testing.RunTests
    /build/go.tip/go/src/pkg/testing/testing.go:426 +0x86b
goroutine 63 [finalizer wait]:
goroutine 61 [syscall]:
syscall.Syscall()
    /build/go.tip/go/src/pkg/syscall/asm_linux_amd64.s:16 +0x5
syscall.read(0x4, 0xc200130600, 0x200, 0x200, 0x8, ...)
    /build/go.tip/go/src/pkg/syscall/zerrors_linux_amd64.go:2337 +0x70
syscall.Read(0x4, 0xc200130600, 0x200, 0x200, 0x413b44, ...)
    /build/go.tip/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc200000ae8, 0xc200130600, 0x200, 0x200, 0x55ab40, ...)
    /build/go.tip/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc200000ae8, 0xc200130600, 0x200, 0x200, 0x0, ...)
    /build/go.tip/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc20012a540, 0xc2000c9d80, 0xc200000ae8, 0x0, 0x0, ...)
    /build/go.tip/go/src/pkg/bytes/buffer.go:166 +0x203
io.Copy(0xc2000c9ab0, 0xc20012a540, 0xc2000c9d80, 0xc200000ae8, 0x0, ...)
    /build/go.tip/go/src/pkg/io/io.go:328 +0xa3
os/exec.func·003(0x63b1cc, 0xc20012a3f0)
    /build/go.tip/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc20012fc20)
    /build/go.tip/go/src/pkg/os/exec/exec.go:274 +0x2a
created by os/exec.(*Cmd).Start
    /build/go.tip/go/src/pkg/os/exec/exec.go:275 +0x6ac
FAIL    runtime 1800.050s

Comment 10:

mailed https://golang.org/cl/7534044/

Owner changed to @dvyukov.

Status changed to Accepted.

Comment 11:

This issue was closed by revision 433824d.

Status changed to Fixed.