Description Reuben Garrett 2012-01-24 14:25:05 EST

Occasional NPE while working with POMs - sometimes while editing the XML, sometimes when viewing effective POM.  After the first NPE, editors exhibit strange behavior, including failure to respond to certain keyboard accelerators (such as Ctrl+C).  In some cases, typing has even been directed to the wrong editor.  The entire Eclipse sessions feels unusable afterwards, requiring a restart to regain operability.  

I'm not sure if this is relevant, but I also see a strange "blipping" on the toolbar as an icon repeatedly appears and disappears - probably in connection with some background process such as building.  This occurs before the NPE, and would not be an issue except that the background process seems sluggish and makes the toolbar unusable for longer than an average use would be willing to wait (can't select icons to the right of the "blipping" button because they repeatedly shift back and forth).  

Not sure how to provoke this reliably, besides to open several editors (at least one of which must be a POM) and hack away at the underlying XML in the POM.  I'm also not sure if this is caused by the m2e plugin or not.  Will attach config and full stack trace.  

!ENTRY org.eclipse.e4.ui.workbench.swt 4 2 2012-01-24 12:53:45.959
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.e4.ui.workbench.swt".
!STACK 0
java.lang.NullPointerException
	at org.eclipse.core.internal.runtime.AdapterManager.hasAdapter(AdapterManager.java:334)
	at org.eclipse.core.internal.expressions.AdaptExpression.evaluate(AdaptExpression.java:77)
	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
	at org.eclipse.core.internal.expressions.AndExpression.evaluate(AndExpression.java:29)
	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
	at org.eclipse.core.internal.expressions.IterateExpression.evaluate(IterateExpression.java:184)
	at org.eclipse.ui.internal.services.EvaluationReference.evaluate(EvaluationReference.java:93)
[remaining frames truncated] 

-- Configuration Details --
Product: Eclipse 1.5.0.20110817-2116 (org.eclipse.epp.package.jee.product)
Installed Features:
 org.eclipse.platform 4.2.0.v20111129-9IF7EHAmFuzFOcSz-MfDWL7uSMPWVz0QZg10z0BYVl6TH