After about 10 minutes of running smoothly, TPT starts hanging for a few seconds at a time, and also starts dumping thousands of frame*.ppm files to the current directory, which I think may be causing the hanging.

Also, if your hard drive gets filled up with those files and runs out of space, TPT segfaults.

Ok seriously

$ ./powder
Segmentation fault (core dumped)
$ du -sh powder/
28G powder/
$ ls powder/ | wc
42486 42486 627182
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/luks-ce4a75fb-57b4-4be2-9268-8ac9f1228cc7
38G 38G 1.8M 100% /

I get an error about gnu/stubs-32.h. I am on a 64-bit system. Is there some special make option I need to use?