https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99513
Bug ID: 99513 Summary: ICE Segmentation fault when decltype lambda in concept template list 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: --- This may be related/duplicated to the 99505, but I am not sure. The following invalid code will trigger Segmentation fault on gcc-10 and gcc-11: template <decltype([]{})> concept C = true; auto f() requires C<{}>; (wandbox: https://wandbox.org/permlink/1gwi5zWcrICysV5G) (godbolt: https://godbolt.org/z/PMYz6e)