http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46852
Summary: ICE: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in cp_parser_class_specifier, at cp/parser.c:16947 Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: g...@abeckmann.de The following code fragment gives an ICE in trunk: ===== 8< ===== template < class { ===== >8 ===== $ g++-trunk -c -v ice-cp_parser_class_specifier.min.ii Using built-in specs. COLLECT_GCC=/opt/software/x86_64/gcc-trunk/bin/g++-trunk COLLECT_LTO_WRAPPER=/opt/software/x86_64/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-trunk/configure --prefix=/opt/software/x86_64/gcc-trunk --program-suffix=-trunk --enable-languages=c,c++ --enable-checking Thread model: posix gcc version 4.6.0 20101207 (experimental) (GCC) COLLECT_GCC_OPTIONS='-c' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/software/x86_64/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus -fpreprocessed ice-cp_parser_class_specifier.min.ii -quiet -dumpbase ice-cp_parser_class_specifier.min.ii -mtune=generic -march=x86-64 -auxbase ice-cp_parser_class_specifier.min -version -o /tmp/ccKrOsa0.s GNU C++ (GCC) version 4.6.0 20101207 (experimental) (x86_64-unknown-linux-gnu) compiled by GNU C version 4.6.0 20101207 (experimental), GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 GNU C++ (GCC) version 4.6.0 20101207 (experimental) (x86_64-unknown-linux-gnu) compiled by GNU C version 4.6.0 20101207 (experimental), GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Compiler executable checksum: 58dd45b357216c1e9d23aab2b8f87581 ice-cp_parser_class_specifier.min.ii:4:1: error: types may not be defined in parameter types ice-cp_parser_class_specifier.min.ii:4:1: error: definition of ‘class<anonymous>’ inside template parameter list ice-cp_parser_class_specifier.min.ii:4:1: error: expected ‘}’ at end of input ice-cp_parser_class_specifier.min.ii:4:1: internal compiler error: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in cp_parser_class_specifier, at cp/parser.c:16947 Please submit a full bug report, This is a regression from 4.5.x which properly gives these errors: $ g++-4.5.x -c ice-cp_parser_class_specifier.min.ii ice-cp_parser_class_specifier.min.ii:4:1: error: types may not be defined in parameter types ice-cp_parser_class_specifier.min.ii:4:1: error: definition of ‘class<anonymous>’ inside template parameter list ice-cp_parser_class_specifier.min.ii:4:1: error: expected ‘}’ at end of input ice-cp_parser_class_specifier.min.ii:4:1: error: expected ‘>’ at end of input ice-cp_parser_class_specifier.min.ii:4:1: error: expected unqualified-id at end of input Andreas