https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93650
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:dfffecb802681fbdb56629d3bdd96491ac660be0 commit r10-6572-gdfffecb802681fbdb56629d3bdd96491ac660be0 Author: Jason Merrill <ja...@redhat.com> Date: Mon Feb 10 14:05:06 2020 +0100 c++: Fix static initialization from <=>. Constant evaluation of genericize_spaceship produced a CONSTRUCTOR, which we then wanted to bind to a reference, which we can't do. So wrap the result in a TARGET_EXPR so we get something with an address. We also need to handle treating the result of cxx_eval_binary_expression as a glvalue for SPACESHIP_EXPR. My earlier change to add uid_sensitive to maybe_constant_value was wrong; we don't even look at the cache when manifestly_const_eval, and I failed to adjust the later call to cxx_eval_outermost_constant_expr. gcc/cp/ChangeLog 2020-02-11 Jason Merrill <ja...@redhat.com> PR c++/93650 PR c++/90691 * constexpr.c (maybe_constant_value): Correct earlier change. (cxx_eval_binary_expression) [SPACESHIP_EXPR]: Pass lval through. * method.c (genericize_spaceship): Wrap result in TARGET_EXPR.
