Problems occurred when invoking code from plug-in: "org.eclipse.jdt.core".

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What steps will reproduce the problem?
1.
2.
3.
Even if I kept an eye on Error Log ViewPart I can't catch the moment when 
exception has occured. I can say that in the moment exception rised I 
did't edit any file. I supposed it's connected with save or build...
I searched the defects list for NullPointerException and I found a similar 
report, accepted (not resolved) in 2004. The method where error occurs is 
the same but line is different (at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.filterAndNorm
alizePositions(ProjectionChangeReconciler.java:272))

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
Eclipse IDE 3.2.1, Coffee Bytes Code Folding 1.0.6, WinXP SP2, Mylar 0.8.0

Please provide any additional information below.

ENTRY org.eclipse.jdt.core 4 2 2006-10-26 13:28:43.974
!MESSAGE Problems occurred when invoking code from plug-in: 
"org.eclipse.jdt.core".
!STACK 0
java.lang.NullPointerException
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.normalizePosi
tion(ProjectionChangeReconciler.java:307)
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.filterAndNorm
alizePositions(ProjectionChangeReconciler.java:272)
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.reconstructAn
notations(ProjectionChangeReconciler.java:175)
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.reconcile(Pro
jectionChangeReconciler.java:148)
    at 
com.cb.eclipse.folding.java.EnhancedJavaFoldingStructureProvider$ElementChangedL
istener.elementChanged(EnhancedJavaFoldingStructureProvider.java:158)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor$3.run(DeltaProcessor.java:1458)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor.notifyListeners(DeltaProcessor.java
:1448)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor.fireReconcileDelta(DeltaProcessor.j
ava:1314)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor.fire(DeltaProcessor.java:1272)
    at 
org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:760
)
    at 
org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation
.java:779)
    at 
org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:112
2)
    at 
org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcil
ingStrategy.java:97)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
    at 
org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReco
ncilingStrategy.java:82)
    at 
org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.initialReconcile(J
avaReconcilingStrategy.java:172)
    at 
org.eclipse.jdt.internal.ui.text.CompositeReconcilingStrategy.initialReconcile(C
ompositeReconcilingStrategy.java:114)
    at 
org.eclipse.jdt.internal.ui.text.JavaCompositeReconcilingStrategy.initialReconci
le(JavaCompositeReconcilingStrategy.java:120)
    at 
org.eclipse.jface.text.reconciler.MonoReconciler.initialProcess(MonoReconciler.j
ava:103)
    at 
org.eclipse.jdt.internal.ui.text.JavaReconciler.initialProcess(JavaReconciler.ja
va:331)
    at 
org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundThread.run(Abstra
ctReconciler.java:170)

!ENTRY org.eclipse.jdt.core 4 4 2006-10-26 13:28:43.984
!MESSAGE Exception occurred in listener of Java element change notification
!STACK 0
java.lang.NullPointerException
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.normalizePosi
tion(ProjectionChangeReconciler.java:307)
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.filterAndNorm
alizePositions(ProjectionChangeReconciler.java:272)
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.reconstructAn
notations(ProjectionChangeReconciler.java:175)
    at 
com.cb.eclipse.folding.java.calculation.ProjectionChangeReconciler.reconcile(Pro
jectionChangeReconciler.java:148)
    at 
com.cb.eclipse.folding.java.EnhancedJavaFoldingStructureProvider$ElementChangedL
istener.elementChanged(EnhancedJavaFoldingStructureProvider.java:158)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor$3.run(DeltaProcessor.java:1458)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor.notifyListeners(DeltaProcessor.java
:1448)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor.fireReconcileDelta(DeltaProcessor.j
ava:1314)
    at 
org.eclipse.jdt.internal.core.DeltaProcessor.fire(DeltaProcessor.java:1272)
    at 
org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:760
)
    at 
org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation
.java:779)
    at 
org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:112
2)
    at 
org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcil
ingStrategy.java:97)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
    at 
org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReco
ncilingStrategy.java:82)
    at 
org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.initialReconcile(J
avaReconcilingStrategy.java:172)
    at 
org.eclipse.jdt.internal.ui.text.CompositeReconcilingStrategy.initialReconcile(C
ompositeReconcilingStrategy.java:114)
    at 
org.eclipse.jdt.internal.ui.text.JavaCompositeReconcilingStrategy.initialReconci
le(JavaCompositeReconcilingStrategy.java:120)
    at 
org.eclipse.jface.text.reconciler.MonoReconciler.initialProcess(MonoReconciler.j
ava:103)
    at 
org.eclipse.jdt.internal.ui.text.JavaReconciler.initialProcess(JavaReconciler.ja
va:331)
    at 
org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundThread.run(Abstra
ctReconciler.java:170)

Original issue reported on code.google.com by antonel....@gmail.com on 28 Oct 2006 at 2:28