https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90212
--- Comment #3 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:aa613a81831bdc044840a95a7a7803a235608503 commit r10-8183-gaa613a81831bdc044840a95a7a7803a235608503 Author: Jason Merrill <ja...@redhat.com> Date: Mon May 25 18:04:39 2020 -0400 c++: constexpr and lambda capture [PR90212] This is the same issue as PR86429, just in potential_constant_expression_1 rather than cxx_eval_constant_expression. As in that case, when we're trying to evaluate a constant expression within a lambda, we don't have a constant closure object to refer to, but we can try to refer directly to the captured variable. gcc/cp/ChangeLog 2020-05-05 Jason Merrill <ja...@redhat.com> PR c++/90212 * constexpr.c (potential_constant_expression_1): In a lambda function, consider a captured variable directly.