https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106788
Bug ID: 106788 Summary: GCC rejects valid program involving initialization of array in member initializer list Product: gcc Version: 9.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: jlame646 at gmail dot com Target Milestone: --- The following valid program is rejected by gcc 9.3 but accepted by gcc 9.4 and onwards. Demo link: https://godbolt.org/z/KT3GWP677 ``` struct A { A(int aa) : a(aa) {} A(const A &a) = delete; A &operator=(const A &a) = delete; private: int a; std::vector<int> v; }; struct B2 { B2() : a2{{1}, {2}} // -> error: use of deleted function 'A::A(const A&)' (gcc 9.3) {} private: A a2[2]; }; ```