https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70513
Bug ID: 70513 Summary: ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- The following causes an ICE when compiled with the current GCC trunk on x86_64-linux-gnu in both 32-bit and 64-bit modes. It seems to also affect at least all GCC versions 4.6.x and later. $ 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/6.0.0/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 6.0.0 20160401 (experimental) [trunk revision 234665] (GCC) $ $ g++-trunk -c small.cpp small.cpp:4:29: internal compiler error: Segmentation fault enum D::Color { R, G, B } c; ^ 0xd5221f crash_signal ../../gcc-source-trunk/gcc/toplev.c:335 0x7bba27 tree_class_check ../../gcc-source-trunk/gcc/tree.h:3128 0x7bba27 finish_member_declaration(tree_node*) ../../gcc-source-trunk/gcc/cp/semantics.c:3025 0x7556dc cp_parser_member_declaration ../../gcc-source-trunk/gcc/cp/parser.c:22635 0x72f8e0 cp_parser_member_specification_opt ../../gcc-source-trunk/gcc/cp/parser.c:22122 0x72f8e0 cp_parser_class_specifier_1 ../../gcc-source-trunk/gcc/cp/parser.c:21314 0x72f8e0 cp_parser_class_specifier ../../gcc-source-trunk/gcc/cp/parser.c:21550 0x72f8e0 cp_parser_type_specifier ../../gcc-source-trunk/gcc/cp/parser.c:15834 0x749ea3 cp_parser_decl_specifier_seq ../../gcc-source-trunk/gcc/cp/parser.c:12758 0x754225 cp_parser_single_declaration ../../gcc-source-trunk/gcc/cp/parser.c:25717 0x75459c cp_parser_template_declaration_after_parameters ../../gcc-source-trunk/gcc/cp/parser.c:25416 0x754fa8 cp_parser_explicit_template_declaration ../../gcc-source-trunk/gcc/cp/parser.c:25644 0x754fa8 cp_parser_template_declaration_after_export ../../gcc-source-trunk/gcc/cp/parser.c:25662 0x75c389 cp_parser_declaration ../../gcc-source-trunk/gcc/cp/parser.c:12094 0x75ad54 cp_parser_declaration_seq_opt ../../gcc-source-trunk/gcc/cp/parser.c:12024 0x75b088 cp_parser_translation_unit ../../gcc-source-trunk/gcc/cp/parser.c:4323 0x75b088 c_parse_file() ../../gcc-source-trunk/gcc/cp/parser.c:37408 0x8bab42 c_common_parse_file() ../../gcc-source-trunk/gcc/c-family/c-opts.c:1064 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. $ --------------------------------- template < typename T > class D { enum D::Color { R, G, B } c; };