https://bugzilla.redhat.com/show_bug.cgi?id=1177672
--- Comment #13 from Ralf Corsepius rc040203@freenet.de --- I think this bug is caused by upstream having used a broken byacc to generate a2p.c.
Grabbing the missing yacc-source file a2p.y from upstream's git (https://github.com/Leont/app-a2p/a2p.y) and regenerating a2p.c using Fedora 21's byacc (byacc-1.9.20130925-4.fc21) seems to fix this issue for me.