[FLEX-35081] Null Pointer Exception in attempt of overriding data property in item renderer

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Apache FlexJS 0.7.0
• Fix Version/s: Apache FalconJX 0.7.0
• Component/s: FalconJX, FlexJS
• Environment: Windows 7; Firefox
• Assignee: Alex Harui
• Reporter: Piotr Zarzycki
• Created: 19/Apr/16 04:57
• Updated: 03/May/16 07:33
• Resolved: 19/Apr/16 06:49

Description

Example TodoListSampleApp - FlexJS repository.
I have created org.apache.flex.html.supportClasses.DataItemRender in mxml. In attempt of compiling following code I got NPE.

Compiled Code

<basic:DataItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
                        xmlns:basic="library://ns.apache.org/flexjs/basic">
    <basic:beads>
        <basic:HorizontalLayout />
    </basic:beads>
    <basic:CheckBox text="{data.selected}"/>
    <basic:Label text="{data.text}"/>
    <basic:TextButton width="50" text="Remove"/>
    <fx:Script>
        <![CDATA[
        override public function set data(value:Object):void {
            super.data = value;
        }
        ]]>
	</fx:Script>
</basic:DataItemRenderer>

Null Pointer Exception

Error:[TodoListSampleApp - TodoListSampleApp]: : java.lang.NullPointerException  	at org.apache.flex.compiler.internal.codegen.js.jx.BinaryOperatorEmitter.emit(BinaryOperatorEmitter.java:118)  	at org.apache.flex.compiler.internal.codegen.js.flexjs.JSFlexJSEmitter.emitBinaryOperator(JSFlexJSEmitter.java:675)  	at org.apache.flex.compiler.internal.codegen.as.ASBlockWalker.visitBinaryOperator(ASBlockWalker.java:525)  	at org.apache.flex.compiler.internal.visitor.as.ASNodeSwitch.handle(ASNodeSwitch.java:349)  	at org.apache.flex.compiler.internal.visitor.as.ASNodeHandler.handle(ASNodeHandler.java:85)  	at org.apache.flex.compiler.internal.visitor.as.BeforeAfterStrategy.handle(BeforeAfterStrategy.java:110)  	at org.apache.flex.compiler.internal.codegen.as.ASBlockWalker.walk(ASBlockWalker.java:157)  	at org.apache.flex.compiler.internal.codegen.js.jx.StatementEmitter.emit(StatementEmitter.java:22)  	at org.apache.flex.compiler.internal.codegen.js.JSEmitter.emitStatement(JSEmitter.java:281)  	at org.apache.flex.compiler.internal.codegen.js.flexjs.JSFlexJSEmitter.emitStatement(JSFlexJSEmitter.java:762)  	at org.apache.flex.compiler.internal.codegen.as.ASBlockWalker.visitBlock(ASBlockWalker.java:335)  	at org.apache.flex.compiler.internal.visitor.as.ASNodeSwitch.handle(ASNodeSwitch.java:279)  	at org.apache.flex.compiler.internal.visitor.as.ASNodeHandler.handle(ASNodeHandler.java:85)  	at org.apache.flex.compiler.internal.visitor.as.BeforeAfterStrategy.handle(BeforeAfterStrategy.java:110)  	at org.apache.flex.compiler.internal.codegen.as.ASBlockWalker.walk(ASBlockWalker.java:157)  	at org.apache.flex.compiler.internal.codegen.as.ASEmitter.emitMethodScope(ASEmitter.java:843)  	at org.apache.flex.compiler.internal.codegen.js.jx.DefinePropertyFunctionEmitter.emit(DefinePropertyFunctionEmitter.java:117)  	at org.apache.flex.compiler.internal.codegen.js.flexjs.JSFlexJSEmitter.emitDefinePropertyFunction(JSFlexJSEmitter.java:714)  	at org.apache.flex.compiler.internal.codegen.js.jx.AccessorEmitter.emit(AccessorEmitter.java:212)  	at org.apache.flex.compiler.internal.codegen.mxml.flexjs.MXMLFlexJSEmitter.emitDocument(MXMLFlexJSEmitter.java:341)  	at org.apache.flex.compiler.internal.codegen.mxml.flexjs.MXMLFlexJSBlockWalker.visitDocument(MXMLFlexJSBlockWalker.java:69)  	at org.apache.flex.compiler.internal.visitor.mxml.MXMLNodeSwitch.handle(MXMLNodeSwitch.java:84)  	at org.apache.flex.compiler.internal.codegen.mxml.MXMLBlockWalker.walk(MXMLBlockWalker.java:149)  	at org.apache.flex.compiler.internal.codegen.mxml.flexjs.MXMLFlexJSBlockWalker.visitFile(MXMLFlexJSBlockWalker.java:61)  	at org.apache.flex.compiler.internal.visitor.mxml.MXMLNodeSwitch.handle(MXMLNodeSwitch.java:90)  	at org.apache.flex.compiler.internal.codegen.mxml.MXMLBlockWalker.walk(MXMLBlockWalker.java:149)  	at org.apache.flex.compiler.internal.codegen.mxml.MXMLBlockWalker.visitCompilationUnit(MXMLBlockWalker.java:168)  	at org.apache.flex.compiler.internal.codegen.mxml.MXMLWriter.writeTo(MXMLWriter.java:67)  	at org.apache.flex.compiler.clients.MXMLJSC.compile(MXMLJSC.java:480)  	at org.apache.flex.compiler.clients.MXMLJSC._mainNoExit(MXMLJSC.java:352)  	at org.apache.flex.compiler.clients.MXMLJSC.mainNoExit(MXMLJSC.java:277)  	at flex2.tools.MxmlJSC.execute(MxmlJSC.java:93)  	at flex2.tools.Tool.compile(Tool.java:81)  	at flex2.tools.Mxmlc.mxmlc(Mxmlc.java:75)  	at com.intellij.flex.compiler.flex4.Flex4Handler.compileSwf(Flex4Handler.java:81)  	at com.intellij.flex.compiler.CompilationThread.run(CompilationThread.java:48)