Null Pointer Exception in VSCodeDebugProtocolPlugin

[piotrzarzycki21]

In debugging version of Moonshine (run from IDE) I'm getting NPE in VSCodeDebugProtocolPlugin with following stack trace:

[Fault] exception, information=TypeError: Error #1009: Cannot access a property or method of a null object reference. at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseSource()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:555] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseStackFrame()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:548] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseStackTraceResponse()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:529] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseResponse()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:343] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseProtocolMessage()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:295] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseMessageBuffer()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:232] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/parseMessageBuffer()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:254] at actionScripts.plugins.vscodeDebug::VSCodeDebugProtocolPlugin/socket_socketDataHandler()[D:\flex_sdk\Projects\Prominic.NET\Moonshine Project\Moonshine-IDE\ide\MoonshineDESKTOPevolved\src\actionScripts\plugins\vscodeDebug\VSCodeDebugProtocolPlugin.as:968]

In released version 1.6.0 and built by ANT version from current master it's not occurs or at least we don't gets any information about it. However once I have started application and set break point as you can see on the screenshot I don't get's code highlighting, debugged application freezes.

Example app attached.
NewFlexDesktopProject.zip

[rat-moonshine]

I can able to reproduce the null error @piotrzarzycki21 described; and also able to reproduced when it happens and when not.

@joshtynjala can you please take a look into this (?) Following is the detailed test case.

This same null point exception I noticed when running Moonshine source or sample project's source, in VSCodeDebugProtocolPlugin.as:

• Create a new Flex Desktop project
• Add a method inside <fx:Script> area - here's the source I used to test

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
			   
	<fx:Declarations>
	</fx:Declarations>
	
	<fx:Script>
		<![CDATA[
			
			private function abcd():void
			{
				trace("help!");
			}
			
		]]>
	</fx:Script>
	
	<s:Label fontSize="24" fontWeight="bold" textAlign="center"
		horizontalCenter="0" verticalCenter="0"
		text="Hello World!"/>
		<s:Button label="hei!" click="abcd()"/>
</s:WindowedApplication>

• Add a breakpoint to the above method's (abcd) code
• Run the application with Build & Debug
• Application starts in debugging mode, clicking on the button highlights and stop to the breakpoint in appropriate place
• Stop the debugger
• Add the abcd() in application's creation complete event now:

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" creationComplete="abcd()">

• Restart Build & Debug
• Moonshine thrown above null pointer exception
• Removing the method running from application's creationComplete event makes everything good again