https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89305
Bug ID: 89305 Summary: CWG DR 253 is not implemented Product: gcc Version: 8.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: raphael.kubo.da.costa at intel dot com Target Milestone: --- I can see a few bugs marked as SUSPENDED related to DR 253 and how there hadn't been an official resolution at the time. According to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0490r0.html and http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#253 it's part of C++17 (even though MSVC and clang implement it for older versions as well). IOW, I believe G++ should accept the following code: struct S { }; struct T { T() {} const S s_; }; rather than failing with const.cc: In constructor ‘T::T()’: const.cc:5:3: error: uninitialized const member in ‘const struct S’ [-fpermissive] T() {} ^ const.cc:6:11: note: ‘const S T::s_’ should be initialized const S s_; ^~