[Bug c++/47476] New: [4.6 Regression] [C++0x] ICE in potential_constant_expression_1

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47476

           Summary: [4.6 Regression] [C++0x] ICE in
                    potential_constant_expression_1
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: ja...@gcc.gnu.org
        ReportedBy: ja...@gcc.gnu.org


int
foo (int a, int b)
{ 
  const bool c ((a != 0) == (b != 26));
  return c;
}

ICEs with -std=c++0x with:
rh672156.ii:4:38: sorry, unimplemented: unexpected ast of kind truth_xor_expr
rh672156.ii:4:38: internal compiler error: in potential_constant_expression_1,
at cp/semantics.c:7709