https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94752
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Iain D Sandoe <ia...@gcc.gnu.org>: https://gcc.gnu.org/g:29f55115583a0dab6cbac749c4f0804fd88e9536 commit r10-7973-g29f55115583a0dab6cbac749c4f0804fd88e9536 Author: Iain Sandoe <i...@sandoe.co.uk> Date: Sun Apr 26 19:34:50 2020 +0100 coroutines: Do not assume parms are named [PR94752]. Parameters to user-defined coroutines might be unnamed. In that case, we must synthesize a name for the coroutine frame copy. gcc/cp/ChangeLog: 2020-04-26 Iain Sandoe <i...@sandoe.co.uk> PR c++/94752 * coroutines.cc (morph_fn_to_coro): Ensure that unnamed function params have a usable and distinct frame field name. gcc/testsuite/ChangeLog: 2020-04-26 Iain Sandoe <i...@sandoe.co.uk> PR c++/94752 * g++.dg/coroutines/pr94752.C: New test.