os: TestReadDir failing on Plan 9 since CL 699375

[0intro]

CL 699375 changed TestReadDir, but the test is now failing on Plan 9.

--- FAIL: TestReadDir (0.00s)
    read_test.go:119: ReadDir /tmp/TestReadDir913501550/001/foo: (nil, ENOTDIR) expected, got ([], <nil>)
rx: threads in main proc exited w/o threadmaybackground
FAIL
FAIL	os	3.577s

@golang/plan9

[gabyhelp]

Related Issues

• os: ReadDir on non-directory doesn't return error on Plan 9 #75196
• os: TestMkdirAll failing Plan 9 #23918 (closed)
• os: TestLongPath failing on Plan 9 #17855 (closed)
• os/exec: TestLookPath fails on plan9 after CL 685755 #74892 (closed)
• cmd/go: TestNoCache failing on Plan 9 #23644 (closed)
• internal/safefilepath: TestFromFS failing on Plan 9 #57142 (closed)
• testing/fstest: test that ReadDir on file returns error, or returns 0 entries if file is empty #44967
• os: TestMkdirAll is broken on plan9 #23902 (closed)
• os: TestRootConsistency* and TestRootRaceRenameDir fail on Plan 9 after CL 627475 #70484 (closed)
• os: TestOpenError fails on some plan9 builders #70440 (closed)

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[millerresearch]

Already reported as issue #75196, fixed by CL 700855, awaiting approval.