runtime: TestCgoExecSignalMask failures

[gopherbot]

#!watchflakes
post <- pkg == "runtime" && test == "TestCgoExecSignalMask" && date != "" && date < "2022-11-05"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestCgoExecSignalMask (2.52s)
    crash_test.go:59: /tmp/workdir/tmp/go-build3848898347/testprogcgo.exe CgoExecSignalMask failed to start: exec: WaitDelay expired before I/O complete

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "runtime" && test == "TestCgoExecSignalMask"

2022-10-31 22:19 openbsd-386-70 go@c81c0279 runtime.TestCgoExecSignalMask (log)

--- FAIL: TestCgoExecSignalMask (2.52s)
    crash_test.go:59: /tmp/workdir/tmp/go-build3848898347/testprogcgo.exe CgoExecSignalMask failed to start: exec: WaitDelay expired before I/O complete

— watchflakes

[bcmills]

Fixed by https://go.dev/cl/446875.

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "runtime" && test == "TestCgoExecSignalMask"

2022-12-16 03:40 netbsd-arm64-bsiegert go@24ac659a runtime.TestCgoExecSignalMask (log)

--- FAIL: TestCgoExecSignalMask (0.18s)
    exec.go:146: test timed out while running command: /var/gobuilder/buildlet/tmp/go-build2870843524/testprogcgo.exe CgoExecSignalMask
    crash_test.go:58: /var/gobuilder/buildlet/tmp/go-build2870843524/testprogcgo.exe CgoExecSignalMask: exit status 2
    crash_cgo_test.go:140: expected "OK\n", got SIGQUIT: quit
        PC=0x20018aefc m=8 sigcode=0

        r0      0x1
        r1      0xef4
        r2      0x4000217dbc
        r3      0x10020
...
        r24     0xffffd2779000
        r25     0xfffffb85b000
        r26     0x4000217e48
        r27     0x1
        r28     0x4000082b60
        r29     0x4000217d48
        lr      0x20018aee0
        sp      0x4000217d50
        pc      0x20018aefc
        fault   0x24f2

— watchflakes