This is caused by a bug in libbacktrace. It has been fixed in upstream gcc, in both the trunk and the 4.8.x branch.
http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=205553 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org