http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56678
Bug #: 56678 Summary: [c++11] non-uglified name in <chrono> Classification: Unclassified Product: gcc Version: 4.6.4 Status: UNCONFIRMED Keywords: rejects-valid Severity: normal Priority: P3 Component: libstdc++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: r...@gcc.gnu.org This fails in C++11 mode: #define T *** #include <bits/stdc++.h> int main() { } This has been broken since at least 4.4, due to this non-uglified T template<typename T> struct __is_ratio : std::false_type { };