http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46400
--- Comment #13 from Peter Bergner <bergner at gcc dot gnu.org> 2012-04-12 19:16:16 UTC --- Created attachment 27145 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27145 Test case from EMAN2 Here's yet another test case that fails (on powerpc64-linux) and is fixed on mainline with Jakub's patch. However, we encountered this using GCC 4.6. Jakub, is it possible to backport your patch to FSF 4.6? I looked at backporting the patch myself, but I'm not really sure what all that GC magic macro stuff is doing to feel confident in backporting it myself. bergner@bns:~/gcc/BUGS> /home/bergner/gcc/install/gcc-fsf-mainline-r175389/bin/g++ -m64 -mcpu=power7 -O0 -ffast-math -fPIC -S libpyEMData2.ii bergner@bns:~/gcc/BUGS> echo $? 0 bergner@bns:~/gcc/BUGS> /home/bergner/gcc/install/gcc-fsf-mainline-r175388/bin/g++ -m64 -mcpu=power7 -O0 -ffast-math -fPIC -S libpyEMData2.ii g++: internal compiler error: Segmentation fault (program cc1plus) Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions.