Fix access to returnTypeOf

pkg/compiler/lib/src/ssa/builder_kernel.dart

 // 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.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../closure.dart';
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart';
@@ skipping 2733 matching lines @@
     // TODO(efortuna): Add source information.
     HInstruction receiver = localsHandler.readThis();
 
     List<HInstruction> inputs = <HInstruction>[];
     if (astAdapter.isInterceptedSelector(selector)) {
       inputs.add(_interceptorFor(receiver));
     }
     inputs.add(receiver);
     inputs.addAll(arguments);
 
+    TypeMask typeMask;
+    if (interfaceTarget is ir.Procedure) {
+      typeMask = astAdapter.returnTypeOf(interfaceTarget);
+    } else {
+      typeMask = closedWorld.commonMasks.dynamicType;
+    }
     HInstruction instruction = new HInvokeSuper(
         astAdapter.getMember(interfaceTarget),
         astAdapter.getClass(containingClass),
         selector,
         inputs,
-        astAdapter.returnTypeOf(interfaceTarget),
+        typeMask,
         null,
         isSetter: selector.isSetter || selector.isIndexSet);
     instruction.sideEffects =
         closedWorld.getSideEffectsOfSelector(selector, null);
     push(instruction);
     return instruction;
   }
 
   @override
   void visitSuperPropertyGet(ir.SuperPropertyGet propertyGet) {
@@ skipping 451 matching lines @@
     enterBlock.setBlockFlow(
         new HTryBlockInformation(
             kernelBuilder.wrapStatementGraph(bodyGraph),
             exception,
             kernelBuilder.wrapStatementGraph(catchGraph),
             kernelBuilder.wrapStatementGraph(finallyGraph)),
         exitBlock);
     kernelBuilder.inTryStatement = previouslyInTryStatement;
   }
 }