https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77638
Bug ID: 77638 Summary: ICE on x86_64-linux-gnu (internal compiler error: tree check: expected tree that contains ‘decl common’ structure, have ‘error_mark’ in cp_parser_template_declaration_after_parameters, at cp/parser.c:25722) Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: chengniansun at gmail dot com 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/7.0.0/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 7.0.0 20160918 (experimental) [trunk revision 240220] (GCC) $ $ g++-trunk small.C small.C:2:11: error: ‘CharT’ has not been declared template <CharT, CharT... String> ^~~~~ small.C:2:18: error: ‘CharT’ has not been declared template <CharT, CharT... String> ^~~~~ small.C:3:30: error: ‘String’ has not been declared typename enable_if<sizeof...(String) == 3, int>::type operator"" _script(); ^~~~~~ small.C:3:47: error: template argument 1 is invalid typename enable_if<sizeof...(String) == 3, int>::type operator"" _script(); ^ small.C:3:75: internal compiler error: tree check: expected tree that contains ‘decl common’ structure, have ‘error_mark’ in cp_parser_template_declaration_after_parameters, at cp/parser.c:25722 typename enable_if<sizeof...(String) == 3, int>::type operator"" _script(); ^ 0x10790d4 tree_contains_struct_check_failed(tree_node const*, tree_node_structure_enum, char const*, int, char const*) ../../gcc-source-trunk/gcc/tree.c:9914 0x79c2a8 contains_struct_check ../../gcc-source-trunk/gcc/tree.h:3140 0x79c2a8 cp_parser_template_declaration_after_parameters ../../gcc-source-trunk/gcc/cp/parser.c:25722 0x79c7a1 cp_parser_explicit_template_declaration ../../gcc-source-trunk/gcc/cp/parser.c:25902 0x79c7a1 cp_parser_template_declaration_after_export ../../gcc-source-trunk/gcc/cp/parser.c:25920 0x7a3e59 cp_parser_declaration ../../gcc-source-trunk/gcc/cp/parser.c:12209 0x7a28af cp_parser_declaration_seq_opt ../../gcc-source-trunk/gcc/cp/parser.c:12139 0x7a2bf8 cp_parser_translation_unit ../../gcc-source-trunk/gcc/cp/parser.c:4356 0x7a2bf8 c_parse_file() ../../gcc-source-trunk/gcc/cp/parser.c:37714 0x917b92 c_common_parse_file() ../../gcc-source-trunk/gcc/c-family/c-opts.c:1073 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. $ $ cat small.C template <bool, typename> struct enable_if; template <CharT, CharT... String> typename enable_if<sizeof...(String) == 3, int>::type operator"" _script();