https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120935
--- Comment #7 from Hans-Peter Nilsson <hp at gcc dot gnu.org> --- (In reply to Hans-Peter Nilsson from comment #5) > Either (similarly to the posted patch) somehow not look at > MAX_FIXED_MODE_SIZE or just accept defeat: being able to create an object > larger than (1<<64)/8 bytes on the stack is IMHO not of practical use. FAOD, I had second thoughts, but just for the release branch. Now three patches, with this one committed, and the other two in progress for the master branch.