[gomaja]

On systems other than Plan 9, SetDeadline, SetReadDeadline and
SetWriteDeadline return the poll.FD error as is, so on a closed File
they return internal/poll's ErrFileClosing instead of ErrClosed.
ReadDir, Readdir and Readdirnames put the same error in a PathError
without converting it, except on Windows and Plan 9.

Convert it to ErrClosed, as wrapErr does for the other methods. The
deadline setters still return other errors, such as ErrNoDeadline,
unwrapped. On darwin, name the operation "readdir" when OpenDir reports
no system call, as for a closed File, instead of leaving it empty.

CL 849466 makes the same change for the RawConn methods.

For #82229

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[gopherbot]

Message from Ian Lance Taylor:

Patch Set 1:

(3 comments)

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