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Got this in the error log. Running Eclipse 3.3RC1 -- Error Log -- Date: Wed May 23 13:55:00 EDT 2007 Message: Unhandled event loop exception Severity: Error Plugin ID: org.eclipse.ui Stack Trace: org.eclipse.swt.SWTException: Failed to execute runnable (java.util.ConcurrentModificationException) at org.eclipse.swt.SWT.error(SWT.java:3547) at org.eclipse.swt.SWT.error(SWT.java:3465) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:126) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3650) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3287) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:497) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:436) at org.eclipse.equinox.launcher.Main.run(Main.java:1162) at org.eclipse.equinox.launcher.Main.main(Main.java:1137) Caused by: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793) at java.util.HashMap$KeyIterator.next(HashMap.java:827) at org.eclipse.team.internal.core.subscribers.DiffTreeStatistics.countFor(DiffTreeStatistics.java:75) at org.eclipse.team.core.diff.provider.DiffTree.countFor(DiffTree.java:340) at org.eclipse.team.internal.ccvs.ui.mappings.ChangeSetContentProvider.hasIncomingChanges(ChangeSetContentProvider.java:456) at org.eclipse.team.internal.ccvs.ui.mappings.ChangeSetContentProvider.isVisibleInMode(ChangeSetContentProvider.java:443) at org.eclipse.team.internal.ccvs.ui.mappings.ChangeSetContentProvider.hasChildren(ChangeSetContentProvider.java:511) at org.eclipse.team.internal.ccvs.ui.mappings.ChangeSetContentProvider$2.run(ChangeSetContentProvider.java:273) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67) at org.eclipse.team.internal.ui.Utils$5.run(Utils.java:786) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123) ... 23 more
Given that this code hasn't changed in ages and this is the first reported case of this, I think the fix can wait until 3.4.
Mass update - removing 3.4 target. This was one of the bugs marked for investigation (and potential fixing) in 3.4 but we ran out of time. Please ping on the bug if fixing it would be really important for 3.4, and does not require API changes or feature work.
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.
