https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92156
--- Comment #6 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:14597b680a24b6f7375e4470dea935da9c369feb commit r9-9638-g14597b680a24b6f7375e4470dea935da9c369feb Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Apr 24 00:54:20 2020 +0100 libstdc++: Fix constructor constraints for std::any (PR 90415) This removes a non-standard extension to std::any which causes errors for valid code, due to recursive instantiation of a trait that isn't supposed to be in the constraints. It also removes some incorrect constraints on the in_place_type<T> constructors and emplace members, which were preventing creating a std::any object with another std::any as the contained value. 2020-04-24 Kamlesh Kumar <kamleshbha...@gmail.com> Jonathan Wakely <jwak...@redhat.com> PR libstdc++/90415 PR libstdc++/92156 * include/std/any (any): Rename template parameters for consistency with the standard. (any::_Decay): Rename to _Decay_if_not_any. (any::any(T&&)): Remove is_constructible from constraints. Remove non-standard overload. (any::any(in_place_type_t<T>, Args&&...)) (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...)) (any::emplace(Args&&...)) (any::emplace(initializer_list<U>, Args&&...)): Use decay_t instead of _Decay. * testsuite/20_util/any/cons/90415.cc: New test. * testsuite/20_util/any/cons/92156.cc: New Test. * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives more robust. * testsuite/20_util/any/modifiers/92156.cc: New test. (cherry picked from commit d1462b0782555354b4480e1f46498586d5882972)
