Thorough bug report. It looks like it is crashing when starting up Timidity. This is the library used for playing MIDI on non-windows machines.
It looks like you have Timidity, but perhaps no instrument samples? You might have good luck running the test with strace. It should show the file it is trying to open when crashing.
You may be able to build SDL_mixer without MIDI support, which could work around this?
OS X doesn't have strace, but it has ktrace.
-bob