https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64961
Bug ID: 64961 Summary: nested template implementation crossing namespace fails with access error Product: gcc Version: 4.8.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: eugene at hutorny dot in.ua Created attachment 34686 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34686&action=edit code sample illustrating the issue Consider a case: a template with protected nested structure (Foo<>::Fo) is defined in one namespace (foo), and instantiated in another namespace (bar) via inheritance. Specialization of nested templates methods fails with access error. Compare to specialization of a outer template's method placed in exactly the same scope and compiled with success.