https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104025
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:2aa184458a11a7ec8c1b451b8eeff458a24632bb commit r12-6703-g2aa184458a11a7ec8c1b451b8eeff458a24632bb Author: Jason Merrill <ja...@redhat.com> Date: Mon Jan 17 17:16:38 2022 -0500 c++: input_location and lookahead [PR104025] Debug information was getting confused because input_location was different depending on whether we had looked ahead to see if the next tokens look like a template argument list. I tried resetting input_location in cp_lexer_rollback_tokens itself, but that caused regressions, so let's just do it here for now. PR c++/104025 gcc/cp/ChangeLog: * parser.cc (saved_token_sentinel::rollback): Call cp_lexer_set_source_position. (~saved_token_sentinel): Call rollback. gcc/testsuite/ChangeLog: * g++.dg/warn/pr104025.C: New test. Co-authored-by: Jakub Jelinek <ja...@redhat.com>