http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53873
Bug #: 53873 Summary: [C++11] strange error message for template overloading Classification: Unclassified Product: gcc Version: 4.7.1 Status: UNCONFIRMED Severity: trivial Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: frankhb1...@gmail.com Sometimes g++ complains: sorry, unimplemented: use of 'type_pack_expansion' in template But there seems to be no apparent reason for this error. Please see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53872 for details (an example including code and full diagnostic messages).