os: (nil)*File.Sync() returns syscall.EINVAL on posix platforms

[davecheney]

What steps will reproduce the problem?

*File.Sync() returns syscall.EINVAL on posix platforms when *File is nil, this is
different to all the other *File methods which return ErrInvalid.

What is the expected output? What do you see instead?

Although not documented, the other methods on this type lead me to believe that
*File.Sync() should return ErrInvalid on all platforms when the receiver is nil.

Please use labels and text to provide additional information.

[robpike]

Comment 1:

SGTM

[davecheney]

Comment 2:

This issue was closed by revision f2e946f.

Status changed to Fixed.