Fix host-checked mode failures.

sdk/lib/_internal/compiler/implementation/ssa/codegen.dart

 // 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.
 
 part of ssa;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
@@ skipping 355 matching lines @@
     SsaVariableAllocator allocator = new SsaVariableAllocator(
         compiler,
         intervalBuilder.liveInstructions,
         intervalBuilder.liveIntervals,
         generateAtUseSite,
         parameterNames);
     allocator.visitGraph(graph);
     variableNames = allocator.names;
     shouldGroupVarDeclarations = allocator.names.numberOfVariables > 1;
 
+    // Don't register a return type for lazily initialized variables.

[Søren Gjesse, 2012/11/20 08:40:27]

Maybe assert that work.element is either FunctionElement or xxx (whatever type a
lazily initialized variable is).

+    if (work.element is! FunctionElement) return;
+
     // Register return types to the backend.
     graph.exit.predecessors.forEach((HBasicBlock block) {
       HInstruction last = block.last;
       assert(last is HGoto || last is HReturn);
       if (last is HReturn) {
         backend.registerReturnType(work.element, types[last.inputs[0]]);
       } else {
         backend.registerReturnType(work.element, HType.NULL);
       }
     });
@@ skipping 2719 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }