Fix bug 8841 by running the closure analyzer before compiling a field.

sdk/lib/_internal/compiler/implementation/ssa/builder.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;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 1278 matching lines @@
    * Run through the fields of [cls] and add their potential
    * initializers.
    *
    * Invariant: [classElement] must be an implementation element.
    */
   void buildFieldInitializers(ClassElement classElement,
                               Map<Element, HInstruction> fieldValues) {
     assert(invariant(classElement, classElement.isImplementation));
     classElement.forEachInstanceField(
         (ClassElement enclosingClass, Element member) {
-          TreeElements definitions = compiler.analyzeElement(member);
-          Node node = member.parseNode(compiler);
-          SendSet assignment = node.asSendSet();
-          HInstruction value;
-          if (assignment == null) {
-            value = graph.addConstantNull(constantSystem);
-          } else {
-            Node right = assignment.arguments.head;
-            TreeElements savedElements = elements;
-            elements = definitions;
-            right.accept(this);
-            elements = savedElements;
-            value = pop();
-          }
-          fieldValues[member] = value;
+          compiler.withCurrentElement(member, () {
+            TreeElements definitions = compiler.analyzeElement(member);
+            Node node = member.parseNode(compiler);
+            SendSet assignment = node.asSendSet();
+            HInstruction value;
+            if (assignment == null) {
+              value = graph.addConstantNull(constantSystem);
+            } else {
+              Node right = assignment.arguments.head;
+              TreeElements savedElements = elements;
+              elements = definitions;
+              // In case the field initializer uses closures, run the
+              // closure to class mapper.
+              compiler.closureToClassMapper.computeClosureToClassMapping(
+                  member, node, elements);
+              right.accept(this);
+              elements = savedElements;
+              value = pop();
+            }
+            fieldValues[member] = value;
+          });
         },
         includeBackendMembers: true,
         includeSuperMembers: false);
   }
 
 
   /**
    * Build the factory function corresponding to the constructor
    * [functionElement]:
    *  - Initialize fields with the values of the field initializers of the
@@ skipping 3641 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }