https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63235
--- Comment #6 from Andi Kleen <andi-gcc at firstfloor dot org> --- Created attachment 33483 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33483&action=edit Preprocessed file from the cilk runtime library I'm not sure it'll help you because you would likely need a compiler miscompiled in the same way as mine?