https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99815
Bug ID: 99815 Summary: ICE: in placeholder_type_constraint_dependent_p, at cp/pt.c:28193 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: --- https://godbolt.org/z/4vx18beMW template <typename...> concept C = true; template <typename... Ts> auto bar(Ts...) { C<Ts...> auto x = 0; } <source>:4:37: internal compiler error: in placeholder_type_constraint_dependent_p, at cp/pt.c:28193 4 | auto bar(Ts...) { C<Ts...> auto x = 0; } | ^ 0x1cfb7f9 internal_error(char const*, ...) ???:0 0x6ba871 fancy_abort(char const*, int, char const*) ???:0 0x90a81a do_auto_deduction(tree_node*, tree_node*, tree_node*, int, auto_deduction_context, tree_node*, int) ???:0 0x7b1dd4 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int) ???:0 0x8e12ad c_parse_file() ???:0 0xa600a2 c_common_parse_file() ???:0 Please submit a full bug report, with preprocessed source if appropriate.