http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50678
--- Comment #24 from Iain Sandoe <iains at gcc dot gnu.org> 2011-10-12 19:57:15 UTC --- reproducible (using gdb 7.1) on darwin9 @ m64 (m32 is OK on D9 and D10) - - so where are we looking for a problem- in the m64 libgcc_s unwinder - or in the ada handers? .. or in libSystem ?