Fix for issue 6623 - Canonicalize implicit static closure objects.

runtime/vm/intermediate_language.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 2002 matching lines @@
 }
 
 
 LocationSummary* CreateClosureInstr::MakeLocationSummary() const {
   return MakeCallSummary();
 }
 
 
 void CreateClosureInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   const Function& closure_function = function();
+  ASSERT(!closure_function.IsImplicitStaticClosureFunction());
   const Code& stub = Code::Handle(
       StubCode::GetAllocationStubForClosure(closure_function));
   const ExternalLabel label(closure_function.ToCString(), stub.EntryPoint());
   compiler->GenerateCall(token_pos(),
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
@@ skipping 611 matching lines @@
       return Array::length_offset();
     default:
       UNREACHABLE();
       return -1;
   }
 }
 
 #undef __
 
 }  // namespace dart