Fix #469

lib/src/codegen/js_codegen.dart

 // Copyright (c) 2015, 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 'dart:collection' show HashSet, HashMap, SplayTreeSet;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/src/generated/ast.dart' hide ConstantEvaluator;
 import 'package:analyzer/src/generated/constant.dart';
@@ skipping 2036 matching lines @@
       }
 
       target = _getTarget(lhs);
       id = lhs.propertyName;
     } else if (lhs is PrefixedIdentifier) {
       target = lhs.prefix;
       id = lhs.identifier;
     }
 
     if (target != null && DynamicInvoke.get(target)) {
-      return js.call('dart.$DPUT(#, #, #)', [
-        _visit(target),
-        _emitMemberName(id.name, type: getStaticType(target)),
-        _visit(rhs)
-      ]);
+      return js.call('dart.$DPUT(#, #, #)',
+          [_visit(target), _emitMemberName(id.name), _visit(rhs)]);
     }
 
     return _visit(rhs).toAssignExpression(_visit(lhs));
   }
 
   JS.Expression _emitNullSafeSet(PropertyAccess node, Expression right) {
     // Emit `obj?.prop = expr` as:
     //
     //     (_ => _ == null ? null : _.prop = expr)(obj).
     //
@@ skipping 1742 matching lines @@
 
 /// A special kind of element created by the compiler, signifying a temporary
 /// variable. These objects use instance equality, and should be shared
 /// everywhere in the tree where they are treated as the same variable.
 class TemporaryVariableElement extends LocalVariableElementImpl {
   TemporaryVariableElement.forNode(Identifier name) : super.forNode(name);
 
   int get hashCode => identityHashCode(this);
   bool operator ==(Object other) => identical(this, other);
 }