https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58487
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:953bbeaeff050f4d0b670568a587aa1ce82ed711 commit r14-1660-g953bbeaeff050f4d0b670568a587aa1ce82ed711 Author: Jason Merrill <ja...@redhat.com> Date: Fri Jun 9 10:37:35 2023 -0400 c++: fix 32-bit spaceship failures [PR110185] Various spaceship tests failed after r14-1624. This turned out to be because the comparison category classes return in memory on 32-bit targets, and the synthesized operator<=> looks something like if (auto v = a.x <=> b.x, v == 0); else return v; if (auto v = a.y <=> b.y, v == 0); else return v; etc. so check_return_expr was trying to do NRVO for all the 'v' variables, and now on subsequent returns we check to see if the previous NRV is still in scope. But the NRVs didn't have names, so looking up name bindings crashed. Fixed both by giving 'v' a name so we can NRVO the first one, and fixing the test to give up if the old NRV has no name. PR c++/110185 PR c++/58487 gcc/cp/ChangeLog: * method.cc (build_comparison_op): Give retval a name. * typeck.cc (check_return_expr): Fix for nameless variables.
