#0  0xb74ec9a4 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1  0xb75cebf0 in pthread_mutex_unlock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb74ee60e in malloc () from /lib/tls/i686/cmov/libc.so.6
#3  0xb74f00d6 in realloc () from /lib/tls/i686/cmov/libc.so.6
#4  0xb7887ea4 in ?? () from /usr/lib/libcairo.so.2
#5  0x00000000 in ?? ()