Hello Eli,

>
> The value of c (4195374 = 0x40042e) doesn't make sense, I think.  It's
> an invalid character.  Please tell what does this display:
>
>  (gdb) frame 2
>  (gdb) p it->string
>  (gdb) xstring
>
> Also, in the same frame, what does this display:
>
>  (gdb) pgrowx it->glyph_row
>
> For these commands to work, you need either to start GDB from the src
> directory, or type "source /path/to/emacs/src/.gdbinit" from inside
> GDB.

the system is temporarily unavailable now.

similar crash occurred on my laptop(ubuntu 12.04), back trace is attached. and
I kept the gdb console open, please ask for further info.