eclipse build errors

I am getting this error in regular interval.

'Building workspace' has encountered a problem.

Errors occurred during the build.
    Errors running builder 'JavaScript Validator' on project 'bankinguru'.
    java.lang.NullPointerException

I am using

Eclipse for PHP Developers

Version: Helios Release
Build id: 20100617-1415

under Ubuntu 10.10 . Is there anyway to solve this problem?

[EDIT]: StackTrace of workspace/.metadata/.log

!ENTRY org.eclipse.core.resources 4 75 2011-02-26 15:28:28.901
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.wst.jsdt.core 4 75 2011-02-26 15:28:28.901
!MESSAGE Errors running builder 'JavaScript Validator' on project 'bankinguru'.
!STACK 0
java.lang.NullPointerException
    at org.eclipse.wst.jsdt.internal.compiler.ast.ConditionalExpression.analyseCode(ConditionalExpression.java:50)
    at org.eclipse.wst.jsdt.internal.compiler.ast.ArrayInitializer.analyseCode(ArrayInitializer.java:42)
    at org.eclipse.wst.jsdt.internal.compiler.ast.LocalDeclaration.analyseCode(LocalDeclaration.java:62)
    at org.eclipse.wst.jsdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
    at org.eclipse.wst.jsdt.internal.compiler.ast.IfStatement.analyseCode(IfStatement.java:91)
    at org.eclipse.wst.jsdt.internal.compiler.ast.MethodDeclaration.analyseCode(MethodDeclaration.java:93)
    at org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.analyseCode(AbstractMethodDeclaration.java:108)
    at org.eclipse.wst.jsdt.internal.compiler.ast.MethodDeclaration.analyseCode(MethodDeclaration.java:91)
    at org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.analyseCode(AbstractMethodDeclaration.java:108)
    at org.eclipse.wst.jsdt.internal.compiler.ast.FunctionExpression.analyseCode(FunctionExpression.java:73)
    at org.eclipse.wst.jsdt.internal.compiler.ast.Expression.analyseCode(Expression.java:184)
    at org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.analyseCode(MessageSend.java:65)
    at org.eclipse.wst.jsdt.internal.compiler.ast.CompilationUnitDeclaration.analyseCode(CompilationUnitDeclaration.java:155)
    at org.eclipse.wst.jsdt.internal.compiler.Compiler.process(Compiler.java:589)
    at org开发者_如何学C.eclipse.wst.jsdt.internal.compiler.Compiler.compile(Compiler.java:347)
    at org.eclipse.wst.jsdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:286)
    at org.eclipse.wst.jsdt.internal.core.builder.BatchImageBuilder.compile(BatchImageBuilder.java:86)
    at org.eclipse.wst.jsdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:225)
    at org.eclipse.wst.jsdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:58)
    at org.eclipse.wst.jsdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:291)
    at org.eclipse.wst.jsdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:199)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:172)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:203)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:255)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:258)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:311)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:343)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:242)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

This is occurring because Eclipse is trying to run Javascript Validation on a PHP project. To stop this error, go to 'properties' under the 'project' menu. Select the 'builders' option and deselect 'Javascript Validator'. This should solve your problem.

This is starting to look like a bug in the JavaScript support. See here:

http://www.myeclipseide.com/index.php?name=PNphpBB2&file=viewtopic&p=115100

and here:

http://myeclipseide.com/index.php?name=PNphpBB2&file=viewtopic&p=115099

I'd recommend raising a bug report at:

https://bugs.eclipse.org/bugs/

You should include this stack trace as well as a way that you can reproduce the exception.