Re: 64-bit emacs crashes a lot

[Ryan Johnson <ryan.johnson@cs.utoronto.ca>]

On 16/08/2013 4:33 PM, Ken Brown wrote:
> On 8/16/2013 3:37 PM, Eli Zaretskii wrote:
>>> Date: Fri, 16 Aug 2013 13:12:17 -0400
>>> From: Ken Brown <kbrown@cornell.edu>
>>> CC: ryan.johnson@cs.utoronto.ca, emacs-devel@gnu.org
>>>
>>> I'm attaching two of them.  The first was a SEGV, the second was an 
>>> abort.
>>
>> Both in regex.c.
>>
>>> Lisp Backtrace:
>>>
>>> Breakpoint 1, terminate_due_to_signal (sig=6, 
>>> backtrace_limit=2147483647)
>>>      at emacs.c:341
>>> 341    {
>>> The program being debugged stopped while in a function called from GDB.
>>> Evaluation of the expression containing the function
>>> (backtrace_function) will be abandoned.
>>> When the function is done executing, GDB will silently stop.
>>
>> Here, GDB called backtrace_function, which triggered an assertion
>> violation.  Which probably means that the array of specbindings
>> (specpdl) is corrupted.
>>
>> Is it possible that the stack of the 64-bit Cygwin binary is too
>> small?  Can you try building Emacs with a larger stack?
>
> You are brilliant!  I added LDFLAGS='-Wl,--stack,4194304' to the 
> compilation, and the bug is gone.  Thank you.
>
> Ryan, can you confirm that this fixes the problem for your real uses 
> of M-x compile?
I've been using it for an hour or so with no problems. Even the 
optimized build refuses to crash in 200-300 M-x compile cycles, which is 
enough to satisfy me.

Thanks for all the help, I was pulling my hair out with this one...

Ryan