It seems that the bug is caused by a gcc bug that is only triggered when compiling with optimization. So a workaround would be to build python-rdflib with -O0 on mipsel (and possibly mips, I'm still waiting for the first build logs of enigmail to be published).
Of course it would be better if we could produce a simple test case for a bug report against gcc. WM -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org