[Bug c++/55261] New: [C++0x] ICE (SIGSEGV) when inheriting implicit constructor

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55261

             Bug #: 55261
           Summary: [C++0x] ICE (SIGSEGV) when inheriting implicit
                    constructor
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 28652
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28652
reduced testcase

I don't know if the code is valid.

Compiler output:
$ gcc testcase.C -std=c++11
testcase.C:4:8: internal compiler error: Segmentation fault
 struct B : A
        ^
0xbc2e9f crash_signal
        /mnt/svn/gcc-trunk/gcc/toplev.c:333
0x6579f9 vec_t<tree_node*>::operator[](unsigned int)
        /mnt/svn/gcc-trunk/gcc/vec.h:487
0x6579f9 add_implicitly_declared_members
        /mnt/svn/gcc-trunk/gcc/cp/class.c:3016
0x65e2b4 check_bases_and_members
        /mnt/svn/gcc-trunk/gcc/cp/class.c:5343
0x663321 finish_struct_1(tree_node*)
        /mnt/svn/gcc-trunk/gcc/cp/class.c:6237
0x66558c finish_struct(tree_node*, tree_node*)
        /mnt/svn/gcc-trunk/gcc/cp/class.c:6545
0x69413e cp_parser_class_specifier_1
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:18231
0x69413e cp_parser_class_specifier
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:18440
0x69413e cp_parser_type_specifier
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:13568
0x6ab3cd cp_parser_decl_specifier_seq
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:10893
0x6aee09 cp_parser_simple_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:10492
0x6b0e57 cp_parser_block_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:10441
0x6ba23b cp_parser_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:10338
0x6b886d cp_parser_declaration_seq_opt
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:10224
0x6b8b62 cp_parser_translation_unit
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:3796
0x6b8b62 c_parse_file()
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:28144
0x7bdbe4 c_common_parse_file()
        /mnt/svn/gcc-trunk/gcc/c-family/c-opts.c:1007
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