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https://issues.apache.org/jira/browse/FLEX-35323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16040997#comment-16040997
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Josh Tynjala commented on FLEX-35323:
-------------------------------------
Looking in BindingDestinationMaker.makeDestinationFunctionInstructionList(), it
seems likely that the result of psn.getDefinition() will be null, since it's
dynamic:
{code:title=BindingDestinationMaker.java}
IMXMLPropertySpecifierNode psn = (IMXMLPropertySpecifierNode)parent;
IDefinition d = psn.getDefinition();
Binding b = host.getInstanceScope().getBinding(d);
{code}
It can probably fall back to using the name of the IMXMLPropertySpecifierNode
if the definition is null.
> NullPointerException when setting property of <fx:Object/> with binding
> -----------------------------------------------------------------------
>
> Key: FLEX-35323
> URL: https://issues.apache.org/jira/browse/FLEX-35323
> Project: Apache Flex
> Issue Type: Bug
> Components: Falcon
> Affects Versions: Apache FalconJX 0.7.0
> Reporter: Josh Tynjala
>
> Using the following code:
> {code:title=src/InternalError.mxml}
> <?xml version="1.0" encoding="utf-8"?>
> <js:Application xmlns:fx="http://ns.adobe.com/mxml/2009";
> xmlns:js="library://ns.apache.org/flexjs/basic"
> xmlns:local="*">
> <fx:Declarations>
> <fx:Object test="{MY_CONST}"/>
> </fx:Declarations>
> <js:initialView>
> <js:View>
> <js:Label id="label" text="Hello World" x="100"
> y="100"/>
> </js:View>
> </js:initialView>
> <js:valuesImpl>
> <js:SimpleCSSValuesImpl />
> </js:valuesImpl>
> <fx:Script><![CDATA[
> public static const MY_CONST:String = "hello";
> ]]></fx:Script>
> </js:Application>
> {code}
> Compile with js/bin/mxmlc:
> {code}
> mxmlc src/InternalError.mxml
> {code}
> The following error will be included in the output:
> {code}
> InternalError.mxml Error: Internal error in ABC generator subsystem, when
> generating code for:
> /Users/joshtynjala/Development/NextGenAS/examples/HelloFlexJS/src/HelloFlexJS.mxml:
> java.lang.NullPointerException
> at
> org.apache.flex.compiler.internal.as.codegen.LexicalScope.getNameFromDefinition(LexicalScope.java:1178)
> at
> org.apache.flex.compiler.internal.as.codegen.LexicalScope.getBinding(LexicalScope.java:1069)
> at
> org.apache.flex.compiler.internal.codegen.databinding.BindingDestinationMaker.makeDestinationFunctionInstructionList(BindingDestinationMaker.java:131)
> at
> org.apache.flex.compiler.internal.codegen.databinding.BindingInfo.<init>(BindingInfo.java:114)
> at
> org.apache.flex.compiler.internal.codegen.databinding.BindingAnalyzer.analyze(BindingAnalyzer.java:56)
> at
> org.apache.flex.compiler.internal.codegen.databinding.BindingDatabase.analyze(BindingDatabase.java:122)
> at
> org.apache.flex.compiler.internal.codegen.databinding.MXMLBindingDirectiveHelper.visitNode(MXMLBindingDirectiveHelper.java:116)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processMXMLDataBinding(MXMLClassDirectiveProcessor.java:4803)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processMXMLPropertySpecifier(MXMLClassDirectiveProcessor.java:3702)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processNode(MXMLClassDirectiveProcessor.java:962)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.traverse(MXMLClassDirectiveProcessor.java:861)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.traverse(MXMLClassDirectiveProcessor.java:831)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processMXMLObject(MXMLClassDirectiveProcessor.java:3014)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processNode(MXMLClassDirectiveProcessor.java:919)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.traverse(MXMLClassDirectiveProcessor.java:861)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.traverse(MXMLClassDirectiveProcessor.java:831)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processMXMLDeclarations(MXMLClassDirectiveProcessor.java:4132)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processNode(MXMLClassDirectiveProcessor.java:977)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.traverse(MXMLClassDirectiveProcessor.java:861)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.traverse(MXMLClassDirectiveProcessor.java:831)
> at
> org.apache.flex.compiler.internal.as.codegen.MXMLClassDirectiveProcessor.processMainClassDefinitionNode(MXMLClassDirectiveProcessor.java:653)
> at
> org.apache.flex.compiler.internal.as.codegen.GlobalDirectiveProcessor.declareMXMLDocument(GlobalDirectiveProcessor.java:518)
> at
> org.apache.flex.compiler.internal.as.codegen.DirectiveProcessor.processNode(DirectiveProcessor.java:232)
> at
> org.apache.flex.compiler.internal.as.codegen.DirectiveProcessor.traverse(DirectiveProcessor.java:188)
> at
> org.apache.flex.compiler.internal.as.codegen.ABCGenerator.generate(ABCGenerator.java:122)
> at
> org.apache.flex.compiler.internal.units.MXMLCompilationUnit.handleABCBytesRequest(MXMLCompilationUnit.java:199)
> at
> org.apache.flex.compiler.internal.units.CompilationUnitBase.processABCBytesRequest(CompilationUnitBase.java:876)
> at
> org.apache.flex.compiler.internal.units.CompilationUnitBase.access$300(CompilationUnitBase.java:109)
> at
> org.apache.flex.compiler.internal.units.CompilationUnitBase$4$1.call(CompilationUnitBase.java:313)
> at
> org.apache.flex.compiler.internal.units.CompilationUnitBase$4$1.call(CompilationUnitBase.java:309)
> at
> org.apache.flex.compiler.internal.units.requests.RequestMaker$1.call(RequestMaker.java:228)
> at
> org.apache.flex.compiler.internal.units.requests.RequestMaker$1.call(RequestMaker.java:222)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> Can reproduce with both FlexJS 0.7.0 and the latest 0.8.0 release branch
> nightly.
> Simply setting the property without binding does not produce a
> NullPointerException.
> Instead of using <fx:Object/>, if you switch to the following code, there is
> no NullPointerException:
> {code}
> <js:Label text="{MY_CONST}"/>
> {code}
> With that in mind, it may have something to do with the fact that the Object
> class is dynamic.
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