#0  0xb7f21460 in pthread_mutex_lock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#1  0xb5ce5faf in ?? () from /usr/lib/libcairo.so.2
#2  0x000000a4 in ?? ()
#3  0xb7ee7120 in ?? () from /lib/tls/i686/cmov/libc.so.6
#4  0x00000001 in ?? ()
#5  0xbfca9d88 in ?? ()
#6  0xb7e1260e in malloc () from /lib/tls/i686/cmov/libc.so.6
#7  0xb5ce630b in ?? () from /usr/lib/libcairo.so.2
#8  0x00000000 in ?? ()