https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100111
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:6c7905a9f10d28dfd27ddf21d3bf38a3e261ee10 commit r10-10722-g6c7905a9f10d28dfd27ddf21d3bf38a3e261ee10 Author: Jason Merrill <ja...@redhat.com> Date: Tue Apr 12 17:46:59 2022 -0400 c++: empty base constexpr -fno-elide-ctors [PR105245] The patch for 100111 extended our handling of empty base elision to the case where the derived class has no other fields, but we still need to make sure that there's some initializer for the derived object. PR c++/105245 PR c++/100111 gcc/cp/ChangeLog: * constexpr.c (cxx_eval_store_expression): Build a CONSTRUCTOR as needed in empty base handling. gcc/testsuite/ChangeLog: * g++.dg/cpp1y/constexpr-empty2.C: Add -fno-elide-constructors.
