[Bug c++/33496] New: [4.3 regression] ICE with sizeof for invalid argument pack

["reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The following invalid code snippet triggers an ICE on mainline:

==============================================
template<int... N> void foo()
{
  sizeof...N();
}

void bar()
{
  foo<0>();
}
==============================================

bug1.cc: In function 'void foo()':
bug1.cc:3: error: 'N' cannot be used as a function
bug1.cc: In function 'void foo() [with int N = #'argument_pack_select' not
supported by dump_expr#<expression error>]':
bug1.cc:8:   instantiated from here
bug1.cc:3: error: '0' cannot be used as a function
bug1.cc:3: internal compiler error: tree check: expected tree_vec, have
error_mark in tsubst_copy_and_build, at cp/pt.c:10528
Please submit a full bug report, [etc.]

The broken diagnostic "'argument_pack_select' not supported by dump_expr"
is already tracked in PR33118.


-- 
           Summary: [4.3 regression] ICE with sizeof for invalid argument
                    pack
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, monitored
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33496