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

[Jan Djärv]

Hello. 

I guess we can keep this bug report in case it happens again.  I don't think 
looking at your setup will help, these things are usually compiler and/or 
package version dependent. 

      Jan D.

14 aug 2013 kl. 20:23 skrev Simon Stapleton <simon.stapleton@gmail.com>:

> Hi Jan
> 
> Nope, nothing at all.  So I started trying to track down what was causing the 
> issue.  Starting from a virgin .emacs.d/ and .emacs, started re-adding 
> packages to find out which one actually breaks things.
> 
> And, wouldn't you know it, I'm pretty much back to where I was before, and it 
> no longer happens.  The only thing I haven't reinstalled thus far is quack, 
> which appears to no longer be in elpa/melpa, and shouldn't be touching C-mode 
> files anyway.
> 
> This confuses me no end, as I'd started from a virgin .emacs / emacs.d when I 
> moved to 24.3, and re-zapped them a few times trying to get rid of this very 
> problem.
> 
> I can drop a zip/tarball of my old .emacs stuff if it would help anyone 
> figuring out what's going on.
> 
> 
> 
> 
> 
> On 13 Aug 2013, at 22:29, Jan Djärv <jan.h.d@swipnet.se> wrote:
> 
>> Hello.
>> 
>> 13 aug 2013 kl. 20:58 skrev Simon Stapleton <simon.stapleton@gmail.com>:
>> 
>>> 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.
>> 
>> A lisp package should not be able to crash Emacs.  You can try to set these 
>> in your environment before starting Emacs from the command line:
>> 
>> export NSZombieEnabled=YES
>> export MallocGuardEdges=1
>> export MallocScribble=1
>> export MallocErrorAbort=1
>> export MallocCorruptionAbort=1
>> export MallocCheckHeapStart=1000
>> 
>> Emacs will run very slowly, but hopefully it will print something useful if 
>> it is a memory issue.
>> 
>>    Jan D.
>> 
>>