http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60667
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- The http://gcc.gnu.org/ml/gcc-patches/2014-03/msg01370.html fix is still waiting for review, you need that for both --with-build-config=bootstrap-ubsan and --with-build-config=bootstrap-asan. For --with-build-config=bootstrap-asan also the http://gcc.gnu.org/ml/gcc-patches/2014-03/msg01433.html patch is needed, plus --with-build-config=bootstrap-asan will only work with -disable-werror for now (fix for that expected only in stage1).
