#0  0xb76ebd4c in __kernel_vsyscall ()
#1  0xb6fbb827 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#2  0xb6fbcfa3 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#3  0xb6ffada3 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0xb70f389c "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
  [Error: ../sysdeps/posix/libc_fatal.c was not found in source tree]
#4  0xb7000eca in malloc_printerr (action=<optimized out>, str=0xb70ef38d "free(): invalid pointer", ptr=0xb7138450 <main_arena+48>) at malloc.c:4996
  [Error: malloc.c was not found in source tree]
#5  0xb7001b25 in _int_free (av=0xb7138420 <main_arena>, p=<optimized out>, have_lock=0) at malloc.c:3840
  [Error: malloc.c was not found in source tree]
#6  0xb7189c30 in g_free (mem=0xb7138450 <main_arena+48>) at /build/buildd/glib2.0-2.41.1/./glib/gmem.c:190
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gmem.c was not found in source tree]
#7  0x08049899 in main (argc=1, argv=0xbfe3f4b4) at font-thumbnailer.c:317
  312:     rv = 0; /* success */
  313: 
  314:   out:
  315: 
  316:     g_strfreev (arguments);
  317:     g_free (str);
  318:     g_free (contents);
  319: 
  320:     return rv;
  321: }