cmd/go/internal/fsys: symlink test failing on Plan 9

[fhs]

What version of Go are you using (go version)?

$ go version
go version devel +master Tue Oct 13 11:13:17 EDT 2020 plan9/amd64

What did you do?

cpu% cd cmd/go/internal/fsys
cpu% go test 

What did you expect to see?

no test failure

What did you see instead?

--- FAIL: TestWalk_Symlink (0.01s)
    fsys_test.go:664: symlink dir symlink: not supported by plan 9
    --- FAIL: TestWalk_Symlink/symlink_to_dir (0.00s)
        fsys_test.go:686: walkfn: got non nil err argument: stat /tmp/TestWalk_Symlink536627453/001/root/symlink: '/tmp/TestWalk_Symlink536627453/001/root/symlink' does not exist, want nil err argument
    --- FAIL: TestWalk_Symlink/overlay_to_symlink_to_dir (0.00s)
        fsys_test.go:686: walkfn: got non nil err argument: stat /tmp/TestWalk_Symlink536627453/001/root/symlink: '/tmp/TestWalk_Symlink536627453/001/root/symlink' does not exist, want nil err argument
FAIL
exit status: 'fsys.test 86818: 1'
FAIL	cmd/go/internal/fsys	0.344s

@gopherbot add labels OS-Plan9, NeedsFix

[gopherbot]

Change https://golang.org/cl/261897 mentions this issue: cmd/go/internal/fsys: skip symlink test on Plan 9

[jayconrod]

Duplicate of #41950