https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81257
Bug ID: 81257 Summary: ICE on invalid C++ template code: in make_typename_type, at cp/decl.c:3709 Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- $ g++-trunk -v Using built-in specs. COLLECT_GCC=g++-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto --prefix=/usr/local/gcc-trunk --disable-bootstrap Thread model: posix gcc version 8.0.0 20170630 (experimental) [trunk revision 249826] (GCC) $ $ g++-trunk -c small.cpp small.cpp:1:40: internal compiler error: in make_typename_type, at cp/decl.c:3709 template < typename ::template A < int > >; ^ 0x752568 make_typename_type(tree_node*, tree_node*, tag_types, int) ../../gcc-source-trunk/gcc/cp/decl.c:3709 0x7fea55 cp_parser_elaborated_type_specifier ../../gcc-source-trunk/gcc/cp/parser.c:17534 0x7e9d57 cp_parser_type_specifier ../../gcc-source-trunk/gcc/cp/parser.c:16621 0x7fd7ef cp_parser_decl_specifier_seq ../../gcc-source-trunk/gcc/cp/parser.c:13494 0x7f61c5 cp_parser_parameter_declaration ../../gcc-source-trunk/gcc/cp/parser.c:21338 0x805516 cp_parser_template_parameter ../../gcc-source-trunk/gcc/cp/parser.c:15281 0x805516 cp_parser_template_parameter_list ../../gcc-source-trunk/gcc/cp/parser.c:14871 0x809671 cp_parser_explicit_template_declaration ../../gcc-source-trunk/gcc/cp/parser.c:26735 0x809671 cp_parser_template_declaration_after_export ../../gcc-source-trunk/gcc/cp/parser.c:26769 0x813b69 cp_parser_declaration ../../gcc-source-trunk/gcc/cp/parser.c:12609 0x812734 cp_parser_declaration_seq_opt ../../gcc-source-trunk/gcc/cp/parser.c:12536 0x812a78 cp_parser_translation_unit ../../gcc-source-trunk/gcc/cp/parser.c:4386 0x812a78 c_parse_file() ../../gcc-source-trunk/gcc/cp/parser.c:38636 0x959335 c_common_parse_file() ../../gcc-source-trunk/gcc/c-family/c-opts.c:1104 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. $ ---------------------------------------------- template < typename ::template A < int > >;