bug#7815: 24.0.50; "catch exception" in gdb mode is badly handled

[Chong Yidong]

> I'm trying to use the GDB mode of Emacs to debug Ada code.
>
> Running M-x gdb RET RET
> catch exception
>
> raises the following:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   propertize(nil font-lock-face font-lock-function-name-face)
>   gdb-breakpoints-list-handler-custom()
>   gdb-breakpoints-list-handler()
>   apply(gdb-breakpoints-list-handler nil)
>   (save-current-buffer ...

Thanks for the bug report, and sorry for the long delay.  I think this
was independently fixed by Sam Steingold; if you still still see the
problem with latest trunk, please reopen the bug.

revno: 103105
committer: Sam Steingold <sds@gnu.org>
branch nick: trunk
timestamp: Thu 2011-02-03 14:59:17 -0500
message:
  * lisp/progmodes/gdb-mi.el (gdb-breakpoints-list-handler-custom):
  Do not error out when `func' is nil.