https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96576
Bug ID: 96576 Summary: ICE when decltype std::index_sequence Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: hewillk at gmail dot com Target Milestone: --- #include <utility> auto operator|(auto S, auto) { return S; } int main() { decltype(std::index_sequence<0>{} | 0 | 0); } gives: <source>: In function 'int main()': <source>:9:43: internal compiler error: in build_over_call, at cp/call.c:8994 9 | decltype(std::index_sequence<0>{} | 0 | 0); | ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions. (https://godbolt.org/z/8ezT44)