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I get the error shown below when my project is building. Copying the JavaScript files to a clean project doesn't reproduce the error. I therefore can't seem to reproduce the problem in a clean environment. I am running PDT 2.2M7. -- Error Details -- Date: Tue May 18 12:37:45 CEST 2010 Message: Errors running builder 'JavaScript Validator' on project '***'. Severity: Error Product: Eclipse 1.3.0.20100427-1120 (org.eclipse.epp.package.php.product) Plugin: org.eclipse.wst.jsdt.core Exception Stack Trace: java.lang.ArrayIndexOutOfBoundsException: 1 at org.eclipse.wst.jsdt.internal.compiler.flow.UnconditionalFlowInfo.markAsDefinitelyNonNull(UnconditionalFlowInfo.java:1186) at org.eclipse.wst.jsdt.internal.compiler.ast.FieldReference.analyseAssignment(FieldReference.java:80) at org.eclipse.wst.jsdt.internal.compiler.ast.Assignment.analyseCode(Assignment.java:59) at org.eclipse.wst.jsdt.internal.compiler.ast.CompilationUnitDeclaration.analyseCode(CompilationUnitDeclaration.java:162) at org.eclipse.wst.jsdt.internal.compiler.Compiler.process(Compiler.java:589) at org.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:194) 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)
There is not enough information included in this bug report for us to investigate. Please provide steps to reproduce and some sample JavaScript files. Also, can you check which version of the org.eclipse.wst.jsdt.core plugin you are using?
As noted in my original report, I can't create a reproducable situation. After some extensive testing I've been able to reproduce it in a clean environment, but it seems like the error is produced due to a combination of events occuring, and not by a specific piece of code. Due to the propriatary nature of the project involved, I am unable to post the whole here. My narrowed down piece still covers nearly 1000 lines of code, and it's getting increasingly hard to remove lines while still having the builder break, so I don't have much hope that even if I can narrow it down futher, I'll be able to build a sample file. The version of the the plugin is org.eclipse.wst.jsdt.core_1.1.0.v201004290253. Are there not instructions somewhere that could guide me on how to debug an error like this myself? Regards, Marijn.
Hi Marijn, The way I would start debugging this would be to set a breakpoint at line 1186 in UnconditionalFlowInfo to catch the case where the NPE occurs and then I try to work my way back to see how it got in that state. I don't have any specific documentation on debugging JSDT. If you start looking and have questions post them here and I can help point you in the right way. Chris
Hi Chris, Actually I meant some documentation on how to debug an Eclipse plugin in general. I haven't used Eclipse in a while, and it's maybe two years ago since I last debugged a plugin. From what I remember I needed to make a checkout (but maybe that was another plugin) from CVS, and eventually ended up with two Eclipse sessions, one for running the plugin in a "normal" environment, and one for development and debugging of the plugin in question. As I recall it was all fairly easy to setup, but I just can't remember how :(. Regards, Marijn.
You will need to check out the plugin org.eclipse.wst.jsdt.core into your workspace. CVS: dev.eclipse.org:/cvsroot/webtools - use pserver Then you will need to launch a runtime workspace in Debug mode. Go to Run -> Debug Configurations Create a new Eclipse Application. Hit debug and you should be good to go.
Took a while before I got the time to setup the debugging. Well this.extra is null when the exception occurs (that much was probably obvious), but (this part of) the code isn't really self-explanatory for me if you don't know what it does. I find some comments for states where extra === null which said "// if vector not yet allocated, then not initialized". From that would I be correct to infer that it means the markAsDefinitelyNonNull was called while the instance was not yet fully initialized, i.e. that no (proper) call was made yet to addInitializationsFrom() ?
Not sure if it is related but one of the PDT users also complaints on this exception thrown at the exact same line with NPE: java.lang.NullPointerException at org.eclipse.wst.jsdt.internal.compiler.flow.UnconditionalFlowInfo.markAsDefinitelyNonNull(UnconditionalFlowInfo.java:1186) at org.eclipse.wst.jsdt.internal.compiler.ast.FieldReference.analyseAssignment(FieldReference.java:80) at org.eclipse.wst.jsdt.internal.compiler.ast.Assignment.analyseCode(Assignment.java:59) 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.FunctionExpression.analyseCode(FunctionExpression.java:73) at org.eclipse.wst.jsdt.internal.compiler.ast.ObjectLiteralField.analyseCode(ObjectLiteralField.java:78) at org.eclipse.wst.jsdt.internal.compiler.ast.ObjectLiteral.analyseCode(ObjectLiteral.java:97) at org.eclipse.wst.jsdt.internal.compiler.ast.SingleNameReference.analyseAssignment(SingleNameReference.java:80) at org.eclipse.wst.jsdt.internal.compiler.ast.Assignment.analyseCode(Assignment.java:59) 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.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)
Marking this one as a duplicate because the other bug has information on how to reproduce. *** This bug has been marked as a duplicate of bug 317833 ***
