[GitHub] [royale-compiler] yishayw opened a new issue #139: ArrayCollection - comparison of item to null emits setProperty()

[GitBox]

yishayw opened a new issue #139: ArrayCollection - comparison of item to null 
emits setProperty()
URL: https://github.com/apache/royale-compiler/issues/139
 
 
   Test case:
   
   ```
   <?xml version="1.0" encoding="utf-8"?>
   <mx:Application xmlns:fx="http://ns.adobe.com/mxml/2009";
                      xmlns:mx="library://ns.apache.org/royale/mx"
                   applicationComplete="init()"
                      width="600" height="400" >
   
                        <fx:Script>
                                <![CDATA[
                                        import mx.collections.ArrayCollection;
   
                                        private function init():void
                                        {
                                                var myDp:ArrayCollection = new 
ArrayCollection();
                                                myDp.addItem("hello1");
                                                if (myDp[0] != null) // bad line
                                                {
                                                        trace("ok...")
                                                } else
                                                {
                                                        trace("not ok")
                                                }
                                        }
   
                                ]]>
                        </fx:Script>
   </mx:Application>
   
   ```
   The line commented with //bad transpiles to:
   
   `  if (myDp.setProperty(0, null)) {`
   
   which yields a 'not ok' result.

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