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Build Identifier: 20110916-0149 This error happens with both the latest release (1.1.0.201109151100-r) and the nightly build (1.2.0.201112191733). If it makes any difference, I have around 100 projects open across three git repositories. Two of the repos / working trees have a git submodule. The error is repeated in the error log numerous times for a single synchronize operation. Error message and stack trace: An exception occurred invoking extension: org.eclipse.egit.ui.changeSetContent for object org.eclipse.egit.core.synchronize.GitSubscriberMergeContext@1d15f2bb java.lang.ClassCastException: org.eclipse.egit.ui.internal.synchronize.model.GitModelWorkingFile cannot be cast to org.eclipse.egit.ui.internal.synchronize.model.GitModelCacheTree at org.eclipse.egit.ui.internal.synchronize.model.GitModelCacheTree.addChild(GitModelCacheTree.java:108) at org.eclipse.egit.ui.internal.synchronize.model.GitModelCache.handleCacheTree(GitModelCache.java:265) at org.eclipse.egit.ui.internal.synchronize.model.GitModelCache.extractFromCache(GitModelCache.java:235) at org.eclipse.egit.ui.internal.synchronize.model.GitModelCache.getChildrenImpl(GitModelCache.java:190) at org.eclipse.egit.ui.internal.synchronize.model.GitModelObjectContainer.getChildren(GitModelObjectContainer.java:122) at org.eclipse.egit.ui.internal.synchronize.model.GitModelRepository.getListOfCommit(GitModelRepository.java:172) at org.eclipse.egit.ui.internal.synchronize.model.GitModelRepository.getChildren(GitModelRepository.java:76) at org.eclipse.egit.ui.internal.synchronize.model.GitModelRoot.getChildren(GitModelRoot.java:55) at org.eclipse.egit.ui.internal.synchronize.mapping.GitModelWorkbenchAdapter.getChildren(GitModelWorkbenchAdapter.java:29) at org.eclipse.ui.model.BaseWorkbenchContentProvider.getChildren(BaseWorkbenchContentProvider.java:64) at org.eclipse.ui.model.BaseWorkbenchContentProvider.getElements(BaseWorkbenchContentProvider.java:73) at org.eclipse.team.ui.mapping.SynchronizationContentProvider.getDelegateChildren(SynchronizationContentProvider.java:176) at org.eclipse.team.ui.mapping.SynchronizationContentProvider.internalGetChildren(SynchronizationContentProvider.java:99) at org.eclipse.team.ui.mapping.SynchronizationContentProvider.getElements(SynchronizationContentProvider.java:56) at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getElements(SafeDelegateTreeContentProvider.java:101) at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider$1.run(NavigatorContentServiceContentProvider.java:149) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.internalGetChildren(NavigatorContentServiceContentProvider.java:139) at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.getElements(NavigatorContentServiceContentProvider.java:114) at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:1010) at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:703) at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1336) at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:391) at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:917) at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:605) at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:805) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:782) at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:644) at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:753) at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1533) at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:833) at org.eclipse.jface.viewers.AbstractTreeViewer$5.run(AbstractTreeViewer.java:1517) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443) at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404) at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1510) at org.eclipse.team.internal.ui.mapping.CommonViewerAdvisor$NavigableCommonViewer.inputChanged(CommonViewerAdvisor.java:84) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:280) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690) at org.eclipse.team.internal.ui.mapping.CommonViewerAdvisor$5.run(CommonViewerAdvisor.java:521) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.team.internal.ui.Utils$6.run(Utils.java:894) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150) at org.eclipse.swt.widgets.Display.syncExec(Display.java:4330) at org.eclipse.team.internal.ui.Utils.syncExec(Utils.java:891) at org.eclipse.team.internal.ui.Utils.syncExec(Utils.java:886) at org.eclipse.team.internal.ui.mapping.CommonViewerAdvisor.propertyChange(CommonViewerAdvisor.java:517) at org.eclipse.team.internal.ui.synchronize.SynchronizePageConfiguration$1.run(SynchronizePageConfiguration.java:242) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.team.internal.ui.synchronize.SynchronizePageConfiguration.firePropertyChange(SynchronizePageConfiguration.java:237) at org.eclipse.team.internal.ui.synchronize.SynchronizePageConfiguration.setProperty(SynchronizePageConfiguration.java:184) at org.eclipse.team.internal.ui.mapping.DiffTreeChangesSection$7.linkActivated(DiffTreeChangesSection.java:478) at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleActivate(AbstractHyperlink.java:233) at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleMouseUp(AbstractHyperlink.java:327) at org.eclipse.ui.forms.widgets.AbstractHyperlink.access$2(AbstractHyperlink.java:311) at org.eclipse.ui.forms.widgets.AbstractHyperlink$4.handleEvent(AbstractHyperlink.java:125) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3588) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3209) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 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:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410) at org.eclipse.equinox.launcher.Main.main(Main.java:1386) Reproducible: Always Steps to Reproduce: 1. Open the Team Synchronizing perspective 2. Click Synchronize... toolbar button in the Synchronize view 3. Select "Git", click "Next" 4. For each of the Repositories, select refs/remotes/origin/master as the Destination 5. Check "Fetch changes from remote" 6. Check "Include local uncommitted changes in comparison" 7. Click "Finish"
IMHO after replacing Git Commit Model implementation in commit df7527930d3ff1b4529e7716a27e33d2f3d6bde2 we can close this but as invalid.