[Bug: 21.5-b28] Crash when closing xemacs via window manager

[Stephen J. Turnbull]

Raymond Toy writes:
 > ================================================================
 > Dear Bug Team!
 > 
 > Here's a 100% repeatable crash for me on Solaris 10.  This is from a
 > cvs build from 2008-06-01.  (Yes, I'm slow to update cvs builds.)

I think we've seen something like this before, I'll check later.

 > Run xemacs -vanilla.  After the splash screen is displayed, use the
 > window manager button to kill the window.

I suspect that the window manager is just destroying the window
without giving XEmacs a chance to do it itself.  What window manager
are you using?

Also, if you have two windows open, do you get the X Errors?  Do you
get the crash?

 > And so on.  Then it dumps core.  The backtrace says:
 > 
 > #0  0xfe746398 in kill () from /lib/libc.so.1
 > #1  0x000c3b68 in fatal_error_signal (sig=10)
 >     at /apps/public/XEmacs/src/xemacs-21.5-2008-06-01/src/emacs.c:3801
 > #2  0xfe74592c in __sighndlr () from /lib/libc.so.1
 > #3  0xfe73a870 in call_user_handler () from /lib/libc.so.1
 > #4  0x00055854 in malloc_after (val=0x26b8e4, size=2)
 >     at /apps/public/XEmacs/src/xemacs-21.5-2008-06-01/src/alloc.c:314
 > #5  0xfed2666c in XtWidgetToApplicationContext ()
 >    from /usr/openwin/lib/libXt.so.4

I don't understand why XtWidgetToApplicationContext is calling
`malloc_after', which is a static XEmacs function.  Could you try
rebuilding with --with-cflags="--no-thread-jumps --no-crossjumping"
and seeing if the backtrace gives more detail at that point?