os: TestGetwdDeepWithPWDSet failures

[gopherbot]

#!watchflakes
default <- pkg == "os" && test == "TestGetwdDeepWithPWDSet"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 253
    getwd_unix_test.go:61: Getwd len: 253
    getwd_unix_test.go:57:  $PWD len: 454
    getwd_unix_test.go:61: Getwd len: 454
    getwd_unix_test.go:57:  $PWD len: 655
    getwd_unix_test.go:61: Getwd len: 655
    getwd_unix_test.go:57:  $PWD len: 856
    getwd_unix_test.go:61: Getwd len: 856
    getwd_unix_test.go:57:  $PWD len: 1057
    getwd_unix_test.go:61: Getwd len: 0
    getwd_unix_test.go:69: getwd: file name too long
--- FAIL: TestGetwdDeepWithPWDSet (0.00s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "os" && test == "TestGetwdDeepWithPWDSet"

2024-11-06 00:40 gotip-darwin-amd64_11 go@d98c5180 os.TestGetwdDeepWithPWDSet (log)

=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 253
    getwd_unix_test.go:61: Getwd len: 253
    getwd_unix_test.go:57:  $PWD len: 454
    getwd_unix_test.go:61: Getwd len: 454
    getwd_unix_test.go:57:  $PWD len: 655
    getwd_unix_test.go:61: Getwd len: 655
    getwd_unix_test.go:57:  $PWD len: 856
    getwd_unix_test.go:61: Getwd len: 856
    getwd_unix_test.go:57:  $PWD len: 1057
    getwd_unix_test.go:61: Getwd len: 0
    getwd_unix_test.go:69: getwd: file name too long
--- FAIL: TestGetwdDeepWithPWDSet (0.00s)

2024-11-18 02:09 gotip-darwin-amd64_11 go@90b1dc01 os.TestGetwdDeepWithPWDSet (log)

=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 272
    getwd_unix_test.go:61: Getwd len: 272
    getwd_unix_test.go:57:  $PWD len: 473
    getwd_unix_test.go:61: Getwd len: 473
    getwd_unix_test.go:57:  $PWD len: 674
    getwd_unix_test.go:61: Getwd len: 674
    getwd_unix_test.go:57:  $PWD len: 875
    getwd_unix_test.go:61: Getwd len: 875
    getwd_unix_test.go:57:  $PWD len: 1076
    getwd_unix_test.go:61: Getwd len: 0
    getwd_unix_test.go:69: getwd: file name too long
--- FAIL: TestGetwdDeepWithPWDSet (0.00s)

2024-11-20 18:45 gotip-darwin-amd64_11 go@e1dc707f os.TestGetwdDeepWithPWDSet (log)

=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 254
    getwd_unix_test.go:61: Getwd len: 254
    getwd_unix_test.go:57:  $PWD len: 455
    getwd_unix_test.go:61: Getwd len: 455
    getwd_unix_test.go:57:  $PWD len: 656
    getwd_unix_test.go:61: Getwd len: 656
    getwd_unix_test.go:57:  $PWD len: 857
    getwd_unix_test.go:61: Getwd len: 857
    getwd_unix_test.go:57:  $PWD len: 1058
    getwd_unix_test.go:61: Getwd len: 0
    getwd_unix_test.go:69: getwd: file name too long
--- FAIL: TestGetwdDeepWithPWDSet (0.01s)

2024-11-22 03:48 gotip-darwin-amd64_11 go@dbfd0036 os.TestGetwdDeepWithPWDSet (log)

=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 273
    getwd_unix_test.go:61: Getwd len: 273
    getwd_unix_test.go:57:  $PWD len: 474
    getwd_unix_test.go:61: Getwd len: 474
    getwd_unix_test.go:57:  $PWD len: 675
    getwd_unix_test.go:61: Getwd len: 675
    getwd_unix_test.go:57:  $PWD len: 876
    getwd_unix_test.go:61: Getwd len: 876
    getwd_unix_test.go:57:  $PWD len: 1077
    getwd_unix_test.go:61: Getwd len: 0
    getwd_unix_test.go:69: getwd: file name too long
--- FAIL: TestGetwdDeepWithPWDSet (0.00s)

— watchflakes

[dmitshur]

This is a continuation of #69234 (comment). So far, these particular failures seem to only happen on the darwin/amd64 builders with macOS 11.

[ianlancetaylor]

CC @kolyshkin

[ianlancetaylor]

This passes on the gotip-darwin-amd64_11 gomote.

% go test -test.v -test.run=TestGetwdDeepWithPWD os
=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 272
    getwd_unix_test.go:61: Getwd len: 272
    getwd_unix_test.go:57:  $PWD len: 473
    getwd_unix_test.go:61: Getwd len: 473
    getwd_unix_test.go:57:  $PWD len: 674
    getwd_unix_test.go:61: Getwd len: 674
    getwd_unix_test.go:57:  $PWD len: 875
    getwd_unix_test.go:61: Getwd len: 875
    getwd_unix_test.go:57:  $PWD len: 1076
    getwd_unix_test.go:61: Getwd len: 1076
    getwd_unix_test.go:100: Done; len(wd)=1076
--- PASS: TestGetwdDeepWithPWDSet (0.00s)
PASS
ok  	os	0.009s

Even if I get the lengths to match the error message exactly, it passes. Not sure what is going on here.

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "os" && test == "TestGetwdDeepWithPWDSet"

2025-02-26 18:08 go1.24-darwin-amd64_11 release-branch.go1.24@40705319 os.TestGetwdDeepWithPWDSet (log)

=== RUN   TestGetwdDeepWithPWDSet
    getwd_unix_test.go:57:  $PWD len: 254
    getwd_unix_test.go:61: Getwd len: 254
    getwd_unix_test.go:57:  $PWD len: 455
    getwd_unix_test.go:61: Getwd len: 455
    getwd_unix_test.go:57:  $PWD len: 656
    getwd_unix_test.go:61: Getwd len: 656
    getwd_unix_test.go:57:  $PWD len: 857
    getwd_unix_test.go:61: Getwd len: 857
    getwd_unix_test.go:57:  $PWD len: 1058
    getwd_unix_test.go:61: Getwd len: 0
    getwd_unix_test.go:69: getwd: file name too long
--- FAIL: TestGetwdDeepWithPWDSet (0.01s)

— watchflakes

[kolyshkin]

I was looking at it the other week and couldn't understand what is going on. The whole point of the test is to make sure os.Getwd works for cases when directory length is larger than PATH_MAX, and apparently it randomly fails on darwin.

I will try to use gomote to reproduce.