https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115561
--- Comment #2 from GCC 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:3129a2ed6a764c0687efaca9eba53dcf12d1d8a0 commit r15-2361-g3129a2ed6a764c0687efaca9eba53dcf12d1d8a0 Author: Jason Merrill <ja...@redhat.com> Date: Fri Jul 26 16:53:03 2024 -0400 c++: ICE with concept, local class, and lambda [PR115561] Here when we want to synthesize methods for foo()::B maybe_push_to_top_level calls push_function_context, which sets cfun to a dummy value; later finish_call_expr tries to set something in cp_function_chain (i.e. cfun->language), which isn't set. Many places in the compiler check cfun && cp_function_chain to avoid this problem; here we also want to check !cp_unevaluated_operand, like set_flags_from_callee does. PR c++/115561 gcc/cp/ChangeLog: * semantics.cc (finish_call_expr): Check cp_unevaluated_operand. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/concepts-lambda21.C: New test.
