https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109524
--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-13 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:865d712a9a20eed444ce61a0a0106534479bedf1 commit r13-7224-g865d712a9a20eed444ce61a0a0106534479bedf1 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Apr 19 10:01:04 2023 +0200 testsuite: Fix up pr109524.C for -std=c++23 [PR109524] This testcase was reduced such that it isn't valid C++23, so with my usual testing with GXX_TESTSUITE_STDS=98,11,14,17,20,2b it fails: FAIL: g++.dg/pr109524.C -std=gnu++2b (test for excess errors) .../gcc/testsuite/g++.dg/pr109524.C: In function 'nn hh(nn)': .../gcc/testsuite/g++.dg/pr109524.C:35:12: error: cannot bind non-const lvalue reference of type 'nn&' to an rvalue of type 'nn' .../gcc/testsuite/g++.dg/pr109524.C:17:6: note: initializing argument 1 of 'nn::nn(nn&)' The following patch fixes that and I've verified it doesn't change anything on what the test was testing, it still ICEs in r13-7198 and passes in r13-7203, now in all language modes (except for 98 where it is intentionally UNSUPPORTED). 2023-04-19 Jakub Jelinek <ja...@redhat.com> PR tree-optimization/109524 * g++.dg/pr109524.C (nn::nn): Change argument type from nn & to const nn &. (cherry picked from commit 794ffdb0fb6312ce07af0bfc797bef9f4cff4c61)