runtime: misc/cgo/test failure

[alberts]

What steps will reproduce the problem?

GOMAXPROCS=52
./run.bash --no-rebuild
# ../misc/cgo/test
fatal error: all goroutines are asleep - deadlock!

Which compiler are you using (5g, 6g, 8g, gccgo)?

6g

Which operating system are you using?

linux

Which version are you using?  (run 'go version')

go version devel +ca83aeaa55e0 Fri Feb 22 12:23:19 2013 +1100 linux/amd64

Please provide any additional information below.

https://groups.google.com/d/topic/golang-dev/NKt0XfyFd7E/discussion

[alberts]

Comment 1:

Had another manifestation of what I think is the same bug in a test that was checking
that the expected number of goroutines existed at some point:
ng := runtime.NumGoroutine()
if ng > 5 {
    panic(fmt.Sprintf("Test ended with %d running goroutines", ng))
}
it died with the following. goroutine 0 looks suspect.
panic: Test ended with 6 running goroutines
goroutine 5 [running]:
testing.func·004()
    /build/go/go/src/pkg/testing/testing.go:341 +0xbc
test.TestCleanShutdown(0xc200000240)
    test_test.go:32 +0x1a1
testing.tRunner(0xc200000240, 0xbd85a0)
    /build/go/go/src/pkg/testing/testing.go:346 +0x85
created by testing.RunTests
    /build/go/go/src/pkg/testing/testing.go:426 +0x86b
goroutine 1 [chan receive]:
testing.RunTests(0x9a0718, 0xbd85a0, 0x1, 0x1, 0x45f801, ...)
    /build/go/go/src/pkg/testing/testing.go:427 +0x88e
testing.Main(0x9a0718, 0xbd85a0, 0x1, 0x1, 0xbe3088, ...)
    /build/go/go/src/pkg/testing/testing.go:358 +0x8a
main.main()
    test/_test/_testmain.go:43 +0x9a
goroutine 0 [syscall]:
goroutine 6 [syscall]:
syscall.Syscall6()
    /build/go/go/src/pkg/syscall/asm_linux_amd64.s:40 +0x5
syscall.EpollWait(0x9, 0xc2001980c0, 0xa, 0xa, 0xffffffffffffffff, ...)
    /build/go/go/src/pkg/syscall/zerrors_linux_amd64.go:1871 +0x95
net.(*pollster).WaitFD(0xc2001980b0, 0xc20015be40, 0x0, 0x0, 0x0, ...)
    /build/go/go/src/pkg/net/fd_linux.go:151 +0x127
net.(*pollServer).Run(0xc20015be40)
    /build/go/go/src/pkg/net/fd_unix.go:212 +0x10a
created by net.newPollServer
    /build/go/go/src/pkg/net/newpollserver_unix.go:33 +0x2d5

[dvyukov]

Comment 2:

that's the issue with grunning that I described recently somewhere in the group

[alberts]

Comment 3:

Thanks. I linked to the discussion above.

[dvyukov]

Comment 4:

Fixed by
https://code.google.com/p/go/source/detail?r=231af8ac63aafe8d5bd8a2c295034f686cb99368

Owner changed to @dvyukov.

Status changed to Fixed.