Begin separating API and local element builders.

pkg/analyzer/lib/src/generated/resolver.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.src.generated.resolver;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 6539 matching lines @@
       }
     }
   }
 
   /**
    * Given the declared return type of a function, compute the type of the
    * values which should be returned or yielded as appropriate.  If a type
    * cannot be computed from the declared return type, return null.
    */
   DartType _computeReturnOrYieldType(DartType declaredType) {
+    if (_enclosingFunction == null) {
+      print('aaa');

[Brian Wilkerson, 2016/10/18 00:18:29]

I assume this is debugging code that should be removed.

[scheglov, 2016/10/18 01:50:58]

Acknowledged.

+    }
     bool isGenerator = _enclosingFunction.isGenerator;
     bool isAsynchronous = _enclosingFunction.isAsynchronous;
 
     // Ordinary functions just return their declared types.
     if (!isGenerator && !isAsynchronous) {
       return declaredType;
     }
     if (declaredType is InterfaceType) {
       if (isGenerator) {
         // If it's sync* we expect Iterable<T>
@@ skipping 4006 matching lines @@
       return null;
     }
     if (identical(node.staticElement, variable)) {
       if (node.inSetterContext()) {
         result = true;
       }
     }
     return null;
   }
 }