http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54777
Bug #: 54777 Summary: [C++11] Comma operator in constexpr environment can cause ICE Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: daniel.krueg...@googlemail.com Using gcc 4.8.0 20120923 (experimental) and compiler flags -Wall -pedantic -std=c++11 the following code gives an ICE: //------------- struct array { int data[1]; constexpr const int& at(unsigned i) { return (i < 1 ? 0 : throw 1), data[i]; //return i < 1 ? data[i] : (throw 0, data[i]); // OK } }; int main() { constexpr array a{}; constexpr int i = a.at(0); } //------------- " main.cpp||In function 'int main()':| main.cpp|12| in constexpr expansion of 'a.array::at(0u)'| main.cpp|12|internal compiler error: in adjust_temp_type, at cp/semantics.c:6425| " The code should be accepted.