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os/exec: test fails with "runtime: netpoll: break fd ready for -2" on OpenBSD 6.2 builders #35566

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bcmills opened this issue Nov 13, 2019 · 2 comments
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os/exec: test fails with "runtime: netpoll: break fd ready for -2" on OpenBSD 6.2 builders #35566

bcmills opened this issue Nov 13, 2019 · 2 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. OS-OpenBSD Soon This needs action soon. (recent regressions, service outages, unusual time-sensitive situations) Testing An issue that has been verified to require only test changes, not just a test failure.
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Go1.14

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@bcmills
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bcmills commented Nov 13, 2019

CL 206939, a test-only change, introduced a regression on the OpenBSD 6.2 builders (https://build.golang.org/log/edea2d1e1ca4fabe71e3cf98868411e29cfb42cb):

fd 3 open at test start
fd 4 open at test start
fd 5 open at test start
runtime: netpoll: break fd ready for -2
fatal error: runtime: netpoll: break fd ready for something unexpected

runtime stack:
runtime.throw(0x83494b2, 0x39)
	/tmp/workdir/go/src/runtime/panic.go:1106 +0x64
runtime.netpoll(0x0, 0x0, 0xac)
	/tmp/workdir/go/src/runtime/netpoll_kqueue.go:140 +0x35d
runtime.sysmon()
	/tmp/workdir/go/src/runtime/proc.go:4526 +0x34e
runtime.mstart1()
	/tmp/workdir/go/src/runtime/proc.go:1133 +0x8f
runtime.mstart()
	/tmp/workdir/go/src/runtime/proc.go:1098 +0x4f

goroutine 1 [runnable]:
testing.(*M).before(0x8855a40)
	/tmp/workdir/go/src/testing/testing.go:1262
testing.(*M).Run(0x8855a40, 0x0)
	/tmp/workdir/go/src/testing/testing.go:1158 +0x77
main.main()
	_testmain.go:108 +0xfe
FAIL	os/exec	0.108s
@bcmills bcmills added Testing An issue that has been verified to require only test changes, not just a test failure. OS-OpenBSD NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. Soon This needs action soon. (recent regressions, service outages, unusual time-sensitive situations) labels Nov 13, 2019
@bcmills bcmills added this to the Go1.14 milestone Nov 13, 2019
@bcmills bcmills changed the title os/exec: "fatal error: runtime: netpoll: break fd ready for something unexpected" on OpenBSD 6.2 builders os/exec: "runtime: netpoll: break fd ready for -2" on OpenBSD 6.2 builders Nov 13, 2019
@bcmills bcmills changed the title os/exec: "runtime: netpoll: break fd ready for -2" on OpenBSD 6.2 builders os/exec: test fails with "runtime: netpoll: break fd ready for -2" on OpenBSD 6.2 builders Nov 13, 2019
@ianlancetaylor
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CL 207078

@gopherbot
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Change https://golang.org/cl/207078 mentions this issue: os/exec: skip poll descriptors when checking for open descriptors

@jbardin jbardin mentioned this issue Mar 7, 2020
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@golang golang locked and limited conversation to collaborators Nov 12, 2020
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FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-OpenBSD Soon This needs action soon. (recent regressions, service outages, unusual time-sensitive situations) Testing An issue that has been verified to require only test changes, not just a test failure.
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