[Octave-bug-tracker] [bug #43036] popen2 on Windows fails quietly if command writes to stderr

[Colin Macdonald]

Follow-up Comment #3, bug #43036 (project octave):

The reason I used the ping waits was to demonstrate that after the stderr is
written to, fgets returns -1 but errno is still 0 (!).  This is what is
indicated by the "<waiting> (somewhere)" message.

Before that, errno is EINVAL (this is like EAGAIN on unix?).  
Perhaps that EINVAL/EAGAIN thing is a bug too, but if so its an aready known
as per tests in libinterp/corefcn/syscalls.cc.

Probably the s = -1 and errno = 0 condition represents EOF, but I'm not
completely sure.

Anyway, none of that is directly related to this bug.

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