https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102553
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Full backtrace: 0x121ce0f crash_signal /home/apinski/src/upstream-gcc/gcc/gcc/toplev.cc:314 0x14e5890 strip_array_types(tree_node*) /home/apinski/src/upstream-gcc/gcc/gcc/tree.cc:7262 0xc55408 cp_type_quals(tree_node const*) /home/apinski/src/upstream-gcc/gcc/gcc/cp/typeck.cc:11471 0xbc5fbf tsubst_copy /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:17282 0xbc883d tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*) /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:21590 0xbd5e5f tsubst_expr(tree_node*, tree_node*, int, tree_node*) /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:19694 0xbdbcf5 tsubst_template_args(tree_node*, tree_node*, int, tree_node*) /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:13627 0xbeff95 tsubst_aggr_type /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:13875 0xbd1e6e tsubst_decl /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:15101 0xbf42a7 instantiate_template(tree_node*, tree_node*, int) /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:21842 0xbce4f4 instantiate_alias_template /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:21925 0xbce4f4 tsubst(tree_node*, tree_node*, int, tree_node*) /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:15755 0xbef16e lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*, int, int) /home/apinski/src/upstream-gcc/gcc/gcc/cp/pt.cc:10013 0xc1b2ed finish_template_type(tree_node*, tree_node*, int) /home/apinski/src/upstream-gcc/gcc/gcc/cp/semantics.cc:3773 0xb85e18 cp_parser_template_id /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:18422 0xb8608b cp_parser_class_name /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:25889 0xb7b14e cp_parser_qualifying_entity /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:7193 0xb7b14e cp_parser_nested_name_specifier_opt /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:6875 0xb95e28 cp_parser_simple_type_specifier /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:19863 0xb6e9e6 cp_parser_type_specifier /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:19519 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.