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Bug 313620 - NPE in AST when setting a breakpoint on an Array.push
Summary: NPE in AST when setting a breakpoint on an Array.push
Status: RESOLVED FIXED
Alias: None
Product: JSDT
Classification: WebTools
Component: General (show other bugs)
Version: 3.2   Edit
Hardware: PC Windows XP
: P3 normal (vote)
Target Milestone: Future   Edit
Assignee: Project Inbox CLA
QA Contact: Nitin Dahyabhai CLA
URL:
Whiteboard:
Keywords: needinfo
Depends on:
Blocks:
 
Reported: 2010-05-19 15:58 EDT by Simon Kaegi CLA
Modified: 2011-04-18 16:26 EDT (History)
1 user (show)

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Description Simon Kaegi CLA 2010-05-19 15:58:57 EDT 
With the following script:

var foo = [];
foo.push("x");
foo.push("y");

When I try and set a breakpoint on the line with foo.push("x") I get the following stack showing up in the -debug console. I'm running off of HEAD.

java.lang.NullPointerException
	at org.eclipse.wst.jsdt.internal.compiler.lookup.ArrayBinding.getExactMethod(ArrayBinding.java:233)
	at org.eclipse.wst.jsdt.internal.compiler.lookup.Scope.findExactMethod(Scope.java:401)
	at org.eclipse.wst.jsdt.internal.compiler.lookup.Scope.getMethod(Scope.java:1813)
	at org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:307)
	at org.eclipse.wst.jsdt.internal.compiler.ast.Expression.resolve(Expression.java:477)
	at org.eclipse.wst.jsdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:394)
	at org.eclipse.wst.jsdt.core.dom.JavaScriptUnitResolver.resolve(JavaScriptUnitResolver.java:859)
	at org.eclipse.wst.jsdt.core.dom.JavaScriptUnitResolver.resolve(JavaScriptUnitResolver.java:527)
	at org.eclipse.wst.jsdt.core.dom.ASTParser.internalCreateAST(ASTParser.java:862)
	at org.eclipse.wst.jsdt.core.dom.ASTParser.createAST(ASTParser.java:647)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider$1.run(ASTProvider.java:581)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider.createAST(ASTProvider.java:574)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider.getAST(ASTProvider.java:509)
	at org.eclipse.wst.jsdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup.calculateASTandInform(SelectionListenerWithASTManager.java:150)
	at org.eclipse.wst.jsdt.internal.ui.viewsupport.SelectionListenerWithASTManager$3.run(SelectionListenerWithASTManager.java:135)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Comment 1 Simon Kaegi CLA 2010-05-19 16:22:21 EDT 
Also, FWIW this occured in a JavaScript file that was external source so the wrapping project is not a JS project so might not have any useful environment properties set. With that said when debugging this is a fairly common case since the script URI are frequently http based.
Comment 2 Chris Jaun CLA 2010-05-21 17:34:36 EDT 
Can you provide me step-by-step instructions to reproduce?
Comment 3 Chris Jaun CLA 2011-04-18 16:26:32 EDT 
This should have been fixed by BUG316330.