This is Debian bug #305632 (http://bugs.debian.org/cgi- bin/bugreport.cgi?bug=305632).
It's a bashism in the preinst script which got fixed in gnats 4.1.0-0.1. -- install gnats_4.1.0-0_amd64.deb returns Syntax error https://launchpad.net/bugs/71966 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
