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os: TestRemoveDevNull fails on openbsd and netbsd builders #28549

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alexbrainman opened this issue Nov 2, 2018 · 3 comments
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os: TestRemoveDevNull fails on openbsd and netbsd builders #28549

alexbrainman opened this issue Nov 2, 2018 · 3 comments
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@alexbrainman
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I submitted https://go-review.googlesource.com/c/go/+/145220 and it broke all openbsd and netbsd builders. From https://build.golang.org/log/0f1815b49113f97b32f8858e590fd50701fc6eb1

--- FAIL: TestRemoveDevNull (0.00s)
    build_test.go:29: Lstat(/dev/null).Mode().IsRegular() = true; expected false
    build_test.go:34: mayberemovefile(/dev/null) did remove it; oops
FAIL
FAIL	cmd/go/internal/work	0.061s

But CL 145220 did not changed TestRemoveDevNull or code that it calls. I do not even know how to debug this. Perhaps my new test_devnull.txt somehow interfers with TestRemoveDevNull.

I am looking for help. If nothing else I will skip the test or revert CL 145220 tomorrow.

Thank you.

Alex
@ianlancetaylor
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It's a bug in go test -o /dev/null -c when run as root.

@gopherbot
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Change https://golang.org/cl/146901 mentions this issue: cmd/go: don't let "go test -c -o /dev/null" overwrite /dev/null

@ianlancetaylor ianlancetaylor mentioned this issue Nov 2, 2018
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@alexbrainman
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It's a bug in go test -o /dev/null -c

Thank you for fixing that.

In my sleep, I remembered we had some code to handle os.DevNull in go build, but not in go test. Now we have 2 copies of that code.

Alex

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@ianlancetaylor @gopherbot @alexbrainman