https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108829
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>: https://gcc.gnu.org/g:02d8ab3e4e2f3d9dc12157a98c976d6698e71e29 commit r13-6141-g02d8ab3e4e2f3d9dc12157a98c976d6698e71e29 Author: Marek Polacek <pola...@redhat.com> Date: Thu Feb 16 17:41:24 2023 -0500 c++: ICE with redundant capture [PR108829] Here we crash in is_capture_proxy: /* Location wrappers should be stripped or otherwise handled by the caller before using this predicate. */ gcc_checking_assert (!location_wrapper_p (decl)); We only crash with the redundant capture: int abyPage = [=, abyPage] { ... } because prune_lambda_captures is only called when there was a default capture, and with [=] only abyPage won't be in LAMBDA_EXPR_CAPTURE_LIST. The problem is that LAMBDA_CAPTURE_EXPLICIT_P wasn't propagated correctly and so var_to_maybe_prune proceeded where it shouldn't. Co-Authored by: Patrick Palka <ppa...@redhat.com> PR c++/108829 gcc/cp/ChangeLog: * pt.cc (prepend_one_capture): Set LAMBDA_CAPTURE_EXPLICIT_P. (tsubst_lambda_expr): Pass LAMBDA_CAPTURE_EXPLICIT_P to prepend_one_capture. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/lambda/lambda-108829-2.C: New test. * g++.dg/cpp0x/lambda/lambda-108829.C: New test.
