This seems to be a long known bug but it seems only few people run into it. (reference: http://osdir.com/ml/audio.timidity++.general/2006-03/msg00000.html) TiMidity++ can load interfaces dynamical from a directory which can be changed via command line. If you try it, the application will crash because it tries to free memory that was never assigned (to the initial pathname). To reproduce (crashes instantly): timidity -d . --help I recreated the patch described in above reference and put together an ebuild. (attached)
Created attachment 210139 [details, diff] patch to fix crash on changing library path
Created attachment 210141 [details] ebuild using the patch
should be fixed in 2.14.0