https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105304
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:c83b9c54d9dee2dce5d8268472a745b013d166cc commit r12-8257-gc83b9c54d9dee2dce5d8268472a745b013d166cc Author: Patrick Palka <ppa...@redhat.com> Date: Mon Apr 25 21:49:00 2022 -0400 c++: ICE with requires-expr and -Wsequence-point [PR105304] Here we're crashing from verify_sequence_points for this requires-expr condition because it contains a templated CAST_EXPR with empty operand, and verify_tree doesn't ignore this empty operand only because the manual tail recursion that it performs for unary expression trees skips the NULL test. PR c++/105304 gcc/c-family/ChangeLog: * c-common.cc (verify_tree) [restart]: Move up to before the NULL test. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/concepts-requires30.C: New test.
