[Bug c++/47291] New: [4.6 Regression] ICE: SIGSEGV in size_binop_loc (fold-const.c:1427) with -g

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47291

           Summary: [4.6 Regression] ICE: SIGSEGV in size_binop_loc
                    (fold-const.c:1427) with -g
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 22965
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22965
reduced testcase (from g++.old-deja/g++.pt/ptrmem2.C)

Compiler output:
$ gcc -g testcase.C
==15482== Invalid read of size 8
==15482==    at 0x863310: size_binop_loc (fold-const.c:1427)
==15482==    by 0xA12739: byte_from_pos (stor-layout.c:840)
==15482==    by 0x53C217: cplus_expand_constant (expr.c:50)
==15482==    by 0x4FAC3E: fold_cplus_constants (cp-lang.c:218)
==15482==    by 0x7AB5CE: gen_generic_params_dies (dwarf2out.c:13048)
==15482==    by 0x7B51A3: gen_tagged_type_die (dwarf2out.c:20150)
==15482==    by 0x7A8FB0: gen_type_die_with_usage (dwarf2out.c:20500)
==15482==    by 0x7B3EAD: gen_decl_die (dwarf2out.c:21057)
==15482==    by 0x9357BB: rest_of_type_compilation (passes.c:229)
==15482==    by 0x5A6479: finish_struct_1 (class.c:5683)
==15482==    by 0x582A6A: instantiate_class_template (pt.c:8561)
==15482==    by 0x5F0486: complete_type (typeck.c:134)
==15482==    by 0x5344F4: grokdeclarator (decl.c:9651)
==15482==    by 0x5ACFC2: grokfield (decl2.c:806)
==15482==    by 0x5E7B51: cp_parser_member_declaration (parser.c:18010)
==15482==    by 0x5CCA6B: cp_parser_type_specifier (parser.c:17630)
==15482==    by 0x5CE247: cp_parser_decl_specifier_seq (parser.c:9990)
==15482==    by 0x5E55B9: cp_parser_simple_declaration (parser.c:9641)
==15482==    by 0x5E5A48: cp_parser_block_declaration (parser.c:9592)
==15482==    by 0x5E9771: cp_parser_declaration (parser.c:9497)
==15482==    by 0x5E8299: cp_parser_declaration_seq_opt (parser.c:9383)
==15482==    by 0x5E9DE8: c_parse_file (parser.c:3463)
==15482==    by 0x6BE0E4: c_common_parse_file (c-opts.c:1071)
==15482==    by 0xA211D5: toplev_main (toplev.c:579)
==15482==    by 0x62FEBBC: (below main) (in /lib64/libc-2.11.2.so)
==15482==  Address 0x10 is not stack'd, malloc'd or (recently) free'd
==15482==
testcase.C: In instantiation of 'D<&S::i>':
testcase.C:7:15:   instantiated from here
testcase.C:2:30: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r168743 - crash
4.5.2 - OK