Fix to 32-bit kernel.

runtime/vm/kernel_binary_flowgraph.cc

 // Copyright (c) 2016, 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/kernel_binary_flowgraph.h"
 
 #include "vm/compiler.h"
 #include "vm/longjump.h"
 #include "vm/object_store.h"
 
@@ skipping 3477 matching lines @@
                             Z, dart::String::New("main"))));
   if (main.IsField()) {
     UNIMPLEMENTED();
   } else if (main.IsFunction()) {
     const Function& function = Function::Cast(main);
     if (function.kind() == RawFunction::kRegularFunction) {
       const Function& closure_function =
           Function::Handle(Z, function.ImplicitClosureFunction());
       const Instance& closure =
           Instance::ZoneHandle(Z, closure_function.ImplicitStaticClosure());
-      return Constant(closure) + Return(TokenPosition::kNoSource);
+      Fragment instructions = Constant(closure);
+      instructions += Return(TokenPosition::kNoSource);
+      return instructions;
     } else {
       UNIMPLEMENTED();
     }
   } else {
     UNIMPLEMENTED();
   }
   return Fragment();
 }
 
 FlowGraph* StreamingFlowGraphBuilder::BuildGraph(intptr_t kernel_offset) {
@@ skipping 3639 matching lines @@
     metadata_values.SetAt(i, value);
   }
 
   return metadata_values.raw();
 }
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)