[Bug c++/65851] New: ice in set_lattice_value at tree-ssa-cc p.c:535

["dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65851

            Bug ID: 65851
           Summary: ice in set_lattice_value at tree-ssa-cc p.c:535
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

Created attachment 35386
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35386&action=edit
gzipped C++ source code

The attached code, when compiled by gcc trunk dated 20150422, 
with flag -O2 on x86_64, does this

bug201.cc: In member function âvoid CamWnd::Cam_Draw()â:
bug201.cc:95609:6: internal compiler error: in set_lattice_value, at
tree-ssa-cc
p.c:535
 void CamWnd::Cam_Draw() {
      ^
0xed5857 set_lattice_value
    ../../src/trunk/gcc/tree-ssa-ccp.c:535
0xedacdc visit_assignment
    ../../src/trunk/gcc/tree-ssa-ccp.c:2290
0xedacdc ccp_visit_stmt
    ../../src/trunk/gcc/tree-ssa-ccp.c:2364
0xf63174 simulate_stmt
    ../../src/trunk/gcc/tree-ssa-propagate.c:348

This might be related to bug # 63914.