amacbride

I found the answer in https://github.com/OpenGene/GeneFuse/issues/31 -- the NCBI version of hg19 had a different chromosome naming convention, so it doesn't work. The version downloadable from UCSC is fine: wget...

It's most likely a threading issue -- I found that 32-36 threads hangs, but when I tried 1, 2, 4, 8, 16, and 24 it worked fine.