[Bug c++/47526] New: ICE: SIGSEGV in is_empty_class (class.c:6800) with -fabi-version=1 with __typeof of current class member

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47526

           Summary: ICE: SIGSEGV in is_empty_class (class.c:6800) with
                    -fabi-version=1 with __typeof of current class member
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 23161
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23161
reduced testcase (g++.old-deja/g++.ext/typeof2.C)

Crashes at the same place as PR47304, but backtrace is different.

Compiler output:
$ gcc -fabi-version=1 testcase.C
==13286== Invalid read of size 2
==13286==    at 0x599E20: is_empty_class (class.c:6800)
==13286==    by 0x59FD1A: build_base_path (class.c:257)
==13286==    by 0x62D10F: finish_non_static_data_member (semantics.c:1595)
==13286==    by 0x62D926: finish_qualified_id_expr (semantics.c:1760)
==13286==    by 0x640579: finish_id_expression (semantics.c:3161)
==13286==    by 0x5D477B: cp_parser_primary_expression (parser.c:4007)
==13286==    by 0x5D53DF: cp_parser_postfix_expression (parser.c:5165)
==13286==    by 0x5D605A: cp_parser_unary_expression (parser.c:6149)
==13286==    by 0x5D6927: cp_parser_binary_expression (parser.c:6819)
==13286==    by 0x5D6E42: cp_parser_assignment_expression (parser.c:7038)
==13286==    by 0x5D71D9: cp_parser_expression (parser.c:7184)
==13286==    by 0x5D48B6: cp_parser_primary_expression (parser.c:3692)
==13286==    by 0x5D53DF: cp_parser_postfix_expression (parser.c:5165)
==13286==    by 0x5D605A: cp_parser_unary_expression (parser.c:6149)
==13286==    by 0x5DF1AE: cp_parser_sizeof_operand (parser.c:20644)
==13286==    by 0x5D36D4: cp_parser_simple_type_specifier (parser.c:12767)
==13286==    by 0x5CBEE3: cp_parser_type_specifier (parser.c:12624)
==13286==    by 0x5CDD07: cp_parser_decl_specifier_seq (parser.c:9981)
==13286==    by 0x5E72ED: cp_parser_member_declaration (parser.c:17737)
==13286==    by 0x5CC4E3: cp_parser_type_specifier (parser.c:17621)
==13286==    by 0x5CDD07: cp_parser_decl_specifier_seq (parser.c:9981)
==13286==    by 0x5E5029: cp_parser_simple_declaration (parser.c:9632)
==13286==    by 0x5E54B8: cp_parser_block_declaration (parser.c:9583)
==13286==    by 0x5E9201: cp_parser_declaration (parser.c:9488)
==13286==    by 0x5E7D29: cp_parser_declaration_seq_opt (parser.c:9374)
==13286==    by 0x5E9878: c_parse_file (parser.c:3463)
==13286==    by 0x6BF714: c_common_parse_file (c-opts.c:1077)
==13286==    by 0xA27A27: toplev_main (toplev.c:579)
==13286==    by 0x62FEBBC: (below main) (in /lib64/libc-2.11.2.so)
==13286==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==13286== 
testcase.C:4:16: internal compiler error: Segmentation fault
Please submit a full bug report,
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See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r169355 - crash
4.5.2, 4.4.5 - crash
4.3.5 - code is rejected