https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104000
--- Comment #5 from Fedor Chelnokov <fchelnokov at gmail dot com> --- Based on stackoverflow answer, a modified example was found with the delegation to consteval constructor: ``` struct A { int i = 0; consteval A() = default; A(const A&) = delete; A(int) : A(A()) {} }; ``` which is accepted in GCC. Demo: https://gcc.godbolt.org/z/5PjraK5ox Clang rejects it until one remove `A(const A&) = delete`, which is probably another issue.