https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92528
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> --- /home/dcb/gcc/results.278200/bin/gcc /home/dcb/gcc/results.278250/bin/gcc ../tests/catch.hpp:9423:27: internal compiler error: in ipa_get_parm_lattices, at ipa-cp.c:386 So the problem first seems to occur sometime between revision 278200 and 278250. I'll have a go at reducing the code. Maybe the latest development version of creduce is better at reducing C++ code than previous versions.