https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101034
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:df0438f1493c4fe1a7380519d9013148618d9782 commit r9-9639-gdf0438f1493c4fe1a7380519d9013148618d9782 Author: Jonathan Wakely <jwak...@redhat.com> Date: Mon Jun 14 14:18:33 2021 +0100 libstdc++: Fix std::any constraints [PR101034] PR libstdc++/101034 libstdc++-v3/ChangeLog: * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...)) (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint to use lvalue. * testsuite/20_util/any/cons/101034.cc: New test. (cherry picked from commit 14f26c75d255ef05b706a12d25b003da8a2f5b45)