Access to "this" in super reads in a closure.

dart/lib/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.
 
 class SsaCodeGeneratorTask extends CompilerTask {
   final JavaScriptBackend backend;
   SsaCodeGeneratorTask(JavaScriptBackend backend)
       : this.backend = backend,
         super(backend.compiler);
   String get name() => 'SSA code generator';
@@ skipping 1543 matching lines @@
       String methodName = compiler.namer.instanceMethodName(
           currentLibrary, superMethod.name, argumentCount);
       buffer.add('$className.prototype.$methodName.call');
       visitArguments(node.inputs);
     } else if (superMethod.kind == ElementKind.FIELD) {
       buffer.add('this.${compiler.namer.getName(superMethod)}');
     } else {
       assert(superMethod.kind == ElementKind.GETTER);
       String methodName =
           compiler.namer.getterName(currentLibrary, superMethod.name);
-      buffer.add('$className.prototype.$methodName.call(this)');
+      buffer.add('$className.prototype.$methodName.call');
+      visitArguments(node.inputs);

[ngeoffray, 2012/05/31 08:59:23]

Don't we get just only one input (this) ?

[ahe, 2012/05/31 09:08:36]

The input should be two things, the element and "this". "this" may not be what
JS think it is in a closure.

I'm not sure I understand your question. 

[ngeoffray, 2012/05/31 09:37:07]

Very good point. And doing the mistake looks quite easy. Do we have the same
problem line 1559?

     }
     endExpression(JSPrecedence.CALL_PRECEDENCE);
     world.registerStaticUse(superMethod);
   }
 
   visitFieldGet(HFieldGet node) {
     if (!node.isFromActivation()) {
       String name =
           compiler.namer.instanceFieldName(currentLibrary, node.name);
       beginExpression(JSPrecedence.MEMBER_PRECEDENCE);
@@ skipping 1057 matching lines @@
       startBailoutSwitch();
     }
   }
 
   void endLabeledBlock(HLabeledBlockInformation labeledBlockInfo) {
     if (labeledBlockInfo.body.start.hasGuards()) {
       endBailoutSwitch();
     }
   }
 }