http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58606
Bug ID: 58606 Summary: [4.8/4.9 Regression] [c++11] ICE with specialization in variadic template Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: reichelt at gcc dot gnu.org The following valid code snippet (compiled with "-std=c++11") triggers an ICE since GCC 4.8.0: ======================================== template<int&...> struct A { template<typename> struct B; template<typename T> struct B<T*> {}; }; ======================================== bug.cc:5:35: internal compiler error: tree check: expected record_type or union_type or qual_union_type, have template_decl in lookup_template_class_1, at cp/pt.c:7645 template<typename T> struct B<T*> {}; ^ 0xcd83ea tree_check_failed(tree_node const*, char const*, int, char const*, ...) ../../gcc/gcc/tree.c:9176 0x54c851 tree_check3(tree_node*, char const*, int, char const*, tree_code, tree_code, tree_code) ../../gcc/gcc/tree.h:2649 0x5b44be lookup_template_class_1 ../../gcc/gcc/cp/pt.c:7645 0x5b44be lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*, int, int) ../../gcc/gcc/cp/pt.c:7695 0x6b4572 finish_template_type(tree_node*, tree_node*, int) ../../gcc/gcc/cp/semantics.c:2856 0x64cc60 cp_parser_template_id ../../gcc/gcc/cp/parser.c:13219 0x64ce92 cp_parser_class_name ../../gcc/gcc/cp/parser.c:18752 0x642b6f cp_parser_qualifying_entity ../../gcc/gcc/cp/parser.c:5448 0x642b6f cp_parser_nested_name_specifier_opt ../../gcc/gcc/cp/parser.c:5173 0x6362ce cp_parser_class_head ../../gcc/gcc/cp/parser.c:19194 0x6362ce cp_parser_class_specifier_1 ../../gcc/gcc/cp/parser.c:18833 0x638180 cp_parser_class_specifier ../../gcc/gcc/cp/parser.c:19102 0x638180 cp_parser_type_specifier ../../gcc/gcc/cp/parser.c:14081 0x64d679 cp_parser_decl_specifier_seq ../../gcc/gcc/cp/parser.c:11328 0x651cf3 cp_parser_single_declaration ../../gcc/gcc/cp/parser.c:22580 0x654b18 cp_parser_template_declaration_after_export ../../gcc/gcc/cp/parser.c:22456 0x6347e2 cp_parser_member_declaration ../../gcc/gcc/cp/parser.c:19704 0x6357de cp_parser_member_specification_opt ../../gcc/gcc/cp/parser.c:19631 0x6357de cp_parser_class_specifier_1 ../../gcc/gcc/cp/parser.c:18886 0x638180 cp_parser_class_specifier ../../gcc/gcc/cp/parser.c:19102 Please submit a full bug report, [etc.]