Current version is quite old. Please bump to at least 0.12.0 Reproducible: Always
http://wiki.gentoo.org/wiki/Project:Ruby/Pending_Bumps#prawn_0.12.0 Fails tests with jruby to the point where it hangs indefinitely.
*prawn-1.2.1 (05 Aug 2014) 05 Aug 2014; Manuel Rüger <mrueg@gentoo.org> +prawn-1.2.1.ebuild: Version bump. Drop jruby. Rekeywording on bug #519170.