Since where and bt full don’t give any usable info, I’ll skip those.
$ pview
Known pipe types:
osxGraphicsPipe
(all display modules loaded.)
a:0x1c698714:3
b:1
c:0xf8e6cc:3
d:0xf8e1a4:16
1:0xf8e6cc
2:0
3:0
Bus error
$ gdb pview
...
a:0x1c82a524:3
b:1
c:0xf8e6cc:3
d:0xf8e1a4:16
1:0xf8e6cc
2:0
3:0
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x02da7b6e in RenderState::get_generated_shader ()
First run is directly, and second run through gdb.