bug#13086: 24.2.50; Emacs seems to hang at w32proc.c:1126

[Eli Zaretskii]

> Date: Fri, 21 Dec 2012 13:56:38 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> CC: 13086@debbugs.gnu.org, Fabrice Popineau <fabrice.popineau@gmail.com>
> 
> Fabrice Popineau reported a similar problem on his machine, and
> debugged it to find the source.  Based on his findings, I committed to
> the emacs-24 branch (revision 111050) changes that should avoid losing
> track of child processes, and hopefully (after they are merged to the
> trunk) also resolve the problem reported here.

Another commit (trunk revision 111311) should make handling of
subprocess shutdown on MS-Windows even more solid.  As a nice side
effect, the annoying "reader_thread.SetEvent failed with 6 for fd 3"
message no longer appears.