(gdb) run collide_blocks.py
Starting program: /usr/bin/python collide_blocks.py
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 47956696962784 (LWP 13629)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[New Thread 1082149200 (LWP 13632)]
[New Thread 1090541904 (LWP 13633)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47956696962784 (LWP 13629)]
0x00002aaaac095203 in ?? () from /usr/lib/libcairo.so.2
(gdb) bt
#0  0x00002aaaac095203 in ?? () from /usr/lib/libcairo.so.2
#1  0x00002aaaac0954a1 in ?? () from /usr/lib/libcairo.so.2
#2  0x00002aaaac0955a6 in ?? () from /usr/lib/libcairo.so.2
#3  0x00002aaaac058ddd in ?? () from /usr/lib/libcairo.so.2
#4  0x00002aaaac0629ad in ?? () from /usr/lib/libcairo.so.2
#5  0x00002aaaac062b62 in ?? () from /usr/lib/libcairo.so.2
#6  0x00002aaaac065848 in ?? () from /usr/lib/libcairo.so.2
#7  0x00002aaaac065f18 in ?? () from /usr/lib/libcairo.so.2
#8  0x00002aaaac06381e in ?? () from /usr/lib/libcairo.so.2
#9  0x00002aaaac056cfc in ?? () from /usr/lib/libcairo.so.2
#10 0x00002aaaac0503c9 in cairo_paint () from /usr/lib/libcairo.so.2
#11 0x00002aaaab9f36e8 in __pyx_f_3soy_8textures_5Print__clear (
    __pyx_v_self=0x2b9dc9062f30) at src/textures/soy.textures.c:2143
#12 0x00002aaaab9f3528 in __pyx_f_3soy_8textures_5Print__draw (
    __pyx_v_self=0x877c80) at src/textures/soy.textures.c:2181
#13 0x00002aaaab9ecada in __pyx_setprop_3soy_8textures_5Print_text (
    o=0x2b9dc9062f30, v=0x2b9dc9168ae0, x=<value optimized out>)
    at src/textures/soy.textures.c:2032
#14 0x0000000000446e91 in PyObject_GenericSetAttr ()
#15 0x00000000004463e8 in PyObject_SetAttr ()
#16 0x0000000000486011 in PyEval_EvalFrameEx ()
#17 0x0000000000489d60 in PyEval_EvalCodeEx ()
#18 0x0000000000489da2 in PyEval_EvalCode ()