bug#13157: 24.3.50; Crash with Helm?

[Eli Zaretskii]

> From: Fabrice Niessen <fni@missioncriticalit.com>
> Date: Wed, 12 Dec 2012 16:37:05 +0100
> 
> While I had no crash to report for days and days with the version of
> 2012-03-03, it took me 2 mins to get 2 crashes: once when calling
> Helm-for-files, the other maybe when doing the same but I'm not 100%
> sure about it.
> 
> Anyway, it really crashed almost directly.
> 
> I could debug the last crash. See here the backtrace:
> [...]
> #1  0x01154bd1 in emacs_abort () at w32fns.c:7748
> #2  0x01144111 in get_child_status (child=9468, status=0x0,
> options=1, interruptible=false) at sysdep.c:297

Probably a duplicate of 13086.

This abort comes from here:

  while ((pid = waitpid (child, status, options)) < 0)
    {
      /* Check that CHILD is a child process that has not been reaped,
         and that STATUS and OPTIONS are valid.  Otherwise abort,
         as continuing after this internal error could cause Emacs to
         become confused and kill innocent-victim processes.  */
      if (errno != EINTR)
        emacs_abort ();  <<<<<<<<<<<<<<<<<<<<<<<<<

What it means is that Emacs was trying to get exit status of a process
that no longer exists.  To make sure this is the reason, please do
this from GDB:

 (gdb) frame 2
 (gdb) print errno