https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92275
David Binderman <dcb314 at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dcb314 at hotmail dot com --- Comment #2 from David Binderman <dcb314 at hotmail dot com> --- I also see this problem while trying to build file libgfortran/caf/single.c with compiler flag -O3 on revision 277600. I'll have a go at a workaround of using -O2 on the bootstrap. I suspect a useful weekly sanity check would be a bootstrap with -O3 over c,c++ and fortran. Martin's code snippet compiles fine with revision 277550 and -O3, so the new problem looks recent.