https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78715
vopl at bk dot ru changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |vopl at bk dot ru --- Comment #2 from vopl at bk dot ru --- affected versions at now: 6.1, 6.2, 6.3, 6.4, 7.1, 7.2, 7.3, 8.0.1-20180408 one more reproduce: template<typename A, typename T> concept bool SomeConcept = true; template <typename T> void breaker(SomeConcept<int>); class SomeClass { int privateMember; }; int main() { return SomeClass().privateMember; }