Sergey "Shnatsel" Davidoff reported a heap-based buffer overflow in Vala Gstreamer bindings in the Gst.MapInfo() function. Further details are available in the following Red Hat bug:
https://bugzilla.redhat.com/showbug.cgi?id=1177840
This issue was also reported via: https://bugzilla.gnome.org/showbug.cgi?id=678663
and fixed in the following commit:
https://git.gnome.org/browse/vala/commit/?id=3092537db65887e24a3d3e87a27caf9c5295e4f7