bug#16741: Crash while using org-mode, narrowing, and vc-git

[Dmitry Antipov <dmantipov@yandex.ru>]

On 02/13/2014 03:33 PM, E Sabof wrote:

> Program received signal SIGABRT, Aborted.
> 0x00007fd4ac8f0f77 in __GI_raise (sig=sig@entry=6)
>      at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> 56	../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
> (gdb) backtrace
> #0  0x00007fd4ac8f0f77 in __GI_raise (sig=sig@entry=6)
>      at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> #1  0x00007fd4ac8f45e8 in __GI_abort () at abort.c:90
> #2  0x00007fd4ac938aca in __malloc_assert (
>      assertion=assertion@entry=0x7fd4aca426e0 "(unsigned long)(size) >= (unsigned long)(nb)", file=file@entry=0x7fd4aca3e18d "malloc.c",
>      line=line@entry=3637,
>      function=function@entry=0x7fd4aca3e48b <__func__.11428> "_int_malloc")
>      at malloc.c:288
> #3  0x00007fd4ac93c324 in _int_malloc (av=0x7fd4acc7b740 <main_arena>,
>      bytes=<optimized out>) at malloc.c:3637
> #4  0x00007fd4ac93d4d0 in __GI___libc_malloc (bytes=1008) at malloc.c:2859

Obviously this is a heap corruption. Please try to 1) provide a recipe to
reproduce and 2) run temacs under 'valgrind --tool=memcheck' (slow!) to catch
memory errors (also use --log-file=log.txt since an output may be huge).

Dmitry