bug#12814: 24.3.50; Emacs crash in event_to_kboard at keyboard.c:3421

[Eli Zaretskii]

> From: Tassilo Horn <tsdh@gnu.org>
> Date: Tue, 06 Nov 2012 16:13:08 +0100
> 
> The crash occured again.  This time, I think it was during "normal"
> typing, i.e., no DEL.  The (almost identical) backtrace is attached.
> 
> 
> [2:text/plain Hide]
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000544498 in event_to_kboard (event=0xbe9ee0 <kbd_buffer+189056>)
>     at keyboard.c:3421
> warning: Source file is more recent than executable.

Given these repeated warnings, I'm not sure your backtrace is reliable
enough to be used for looking into the problem.  Please consider
rebuilding Emacs.

> 3421    if (WINDOWP (obj))

What is 'obj' here?  Why does it cause a segfault?