[Bug c/50141] New: ICE: tree check: expected var_decl, have parm_decl in get_bit_range, at expr.c:4357 with --param allow-store-data-races=0 and bitfields

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50141

             Bug #: 50141
           Summary: ICE: tree check: expected var_decl, have parm_decl in
                    get_bit_range, at expr.c:4357 with --param
                    allow-store-data-races=0 and bitfields
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: aldyh@gcc.gnu.org
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25063
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25063
reduced testcase

Compiler output:
$ gcc --param allow-store-data-races=0 testcase.c
testcase.c: In function 'foo':
testcase.c:11:7: internal compiler error: tree check: expected var_decl, have
parm_decl in get_bit_range, at expr.c:4357
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The same happens when compiled as C++.