Comment 10 for bug 1401788

(gdb) bt
#0 0x00007fda77ae0f77 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fda77ae45e8 in __GI_abort () at abort.c:90
#2 0x00007fda77b1e4fb in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7fda77c32240 "*** Error in `%s': %s: 0x%s ***\n")
    at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
#3 0x00007fda77b2a996 in malloc_printerr (ptr=0x2527c30, str=0x7fda77c32370 "double free or corruption (out)", action=3) at malloc.c:4923
#4 _int_free (av=<optimized out>, p=0x2527c20, have_lock=0) at malloc.c:3779
#5 0x0000000000436cfc in DoGetImage (planemask=<optimized out>, height=5, width=5, y=0, x=<optimized out>, drawable=<optimized out>, format=<optimized out>, client=0x252b490)
    at dispatch.c:2170
#6 ProcGetImage (client=0x252b490) at dispatch.c:2181
#7 0x0000000000439bde in Dispatch () at dispatch.c:432
#8 0x000000000043db0a in dix_main (argc=2, argv=<optimized out>, envp=<optimized out>) at main.c:296
#9 0x00007fda77acbde5 in __libc_start_main (main=0x428250 <main>, argc=2, ubp_av=0x7fff365f6448, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
    stack_end=0x7fff365f6438) at libc-start.c:260
#10 0x0000000000428281 in _start ()