https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68549
David Binderman <dcb314 at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dcb314 at hotmail dot com --- Comment #5 from David Binderman <dcb314 at hotmail dot com> --- Created attachment 36843 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36843&action=edit gzipped C source code Might be a simpler test case. Found on gcc trunk dated 20151126. Compiler flag -O3 required.