bug#22814: 25.0.91; Emacs runs out of file descriptors on OS X

[Michael Albinus <michael.albinus@gmx.de>]

Eli Zaretskii <eliz@gnu.org> writes:

Hi Eli,

> Crystal ball says something went wrong inside read_doc_string that was
> called just before the call to 'error'.  That function calls
> emacs_open, and you have run out file descriptors.  Can you see what's
> going on inside that call?  (That would require re-running the test
> with a suitably conditioned breakpoint.)

Indeed, Emacs tries to read the docstring of the just fetched
function. And it tries to open etc/DOC for this, which fails due to the
missing file descriptor availability.

I don't believe we need to handle this case; if Emacs is running out of
file descriptors, anything could happen.

I'm testing a patch for kqueue.c, which limits the open file
notification descriptors, as proposed by Anders. According to my tests
this is not necessary for inotify.c (contrary to what I've assumed).
Will commit the patch once the current emacs-25 commits are merged to
the master.

Best regards, Michael.