bug#15088: 24.3; Hard crash on OSX when editing header files

[Simon Stapleton]

Okay, quick rebuild and I can now get a full backtrace.  xbacktrace still 
fails, but it's failing because (I assume) it's had its stack smashed

> No symbol "ARRAY_MARK_FLAG" in current context. 

ARRAY_MARK_FLAG looks a lot like a garbage collection bug being tickled, double 
release going on somewhere maybe?

The source of the issue is almost certainly to do with pabbrev - commenting it 
out in my .emacs makes everything work.

Simon

On 13 Aug 2013, at 20:06, Simon Stapleton <simon.stapleton@gmail.com> wrote:

> Hi Jan.
> 
> On 13 Aug 2013, at 20:00, Jan Djärv <jan.h.d@swipnet.se> wrote:
> 
>>> xbacktrace doesn't do anything on my gdb.  Go figure.
>> 
>> You have to be in the emacs source src/ directory, and do
>> % gdb ../nextstep/Emacs.app/Contents/MacOS/Emacs
>> 
>> or otherwise make gdb read the .gdbinit in the src/ directory.
> 
> Re-downing the source right now, will rebuild and test.
> 
>>> My suspicion is that pabbrev is triggering the issue, but quite how, I 
>>> don't know.
>> 
>> How would that be involved if you started with -Q?
> 
> <insert palm-forehead sound here>
> 
> With -Q, no crash.  Which means it's probably not a core emacs bug, but 
> rather an elisp issue somewhere that's causing badness, right?
> 
> Any ideas on how I should go about chasing it down?
> 
> Cheers
> 
> Simon