Bug 34813 - NPE from builder
Summary: NPE from builder
Status: RESOLVED WORKSFORME
Alias: None
Product: JDT
Classification: Eclipse Project
Component: Core (show other bugs)
Version: 2.1   Edit
Hardware: PC Windows 2000
: P3 normal (vote)
Target Milestone: 2.1 RC3   Edit
Assignee: Kent Johnson CLA
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Reported: 2003-03-12 10:18 EST by Martin Aeschlimann CLA
Modified: 2003-03-12 11:57 EST (History)
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Description Martin Aeschlimann CLA 2003-03-12 10:18:26 EST 
RC2
Did a catch up of several plugins, and invoked build/
Build ended with a error dialog

The 'rebuild all' succeeded

java.lang.NullPointerException
	at org.eclipse.jdt.internal.core.builder.BuildNotifier.aboutToCompile
(BuildNotifier.java:61)
	at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile
(AbstractImageBuilder.java:175)
	at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile
(AbstractImageBuilder.java:168)
	at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.build
(IncrementalImageBuilder.java:110)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildDeltas
(JavaBuilder.java:205)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.build
(JavaBuilder.java:133)
	at org.eclipse.core.internal.events.BuildManager$2.run
(BuildManager.java:424)
	at org.eclipse.core.runtime.Platform.run(Platform.java(Compiled Code))
	at org.eclipse.core.runtime.Platform.run(Platform.java(Compiled Code))
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:125)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:181)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:191)
	at org.eclipse.core.internal.events.BuildManager$1.run
(BuildManager.java:151)
	at org.eclipse.core.runtime.Platform.run(Platform.java(Compiled Code))
	at org.eclipse.core.runtime.Platform.run(Platform.java(Compiled Code))
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:165)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop
(BuildManager.java:243)
	at org.eclipse.core.internal.events.BuildManager.build
(BuildManager.java:212)
	at org.eclipse.core.internal.resources.Workspace.build
(Workspace.java:181)
	at org.eclipse.ui.actions.GlobalBuildAction$1.run
(GlobalBuildAction.java:168)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run
(ModalContext.java:95)
Comment 1 Kent Johnson CLA 2003-03-12 11:04:24 EST 
Martin: Which VM + version are you running?

I expect that this is another case of our infamous VM JIT NPE since line #61 of 
BuildNotifier.aboutToCompile() is:

Util.bind("build.compiling", unit.resource.getFullPath().removeLastSegments
(1).makeRelative().toString())

'unit.resource' cannot be null since the field is set in the constructor and 
never modified after that... none of the path operations ever answer null.
Comment 2 Martin Aeschlimann CLA 2003-03-12 11:40:45 EST 
java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1)
Classic VM (build 1.3.1, J2RE 1.3.1 IBM Windows 32 build cn131-20020403 (JIT ena
bled: jitc))

I agree, this can't happen.
Comment 3 Kent Johnson CLA 2003-03-12 11:56:28 EST 
Just to change the resolution.
Comment 4 Kent Johnson CLA 2003-03-12 11:57:30 EST 
Closing due to VM JIT bug.