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Eclipse 2021-06, Windows 10 When I accidentally compared a java source file with project folder using "Compare With/Each Other"; I got a "Unhandled event loop exception" eclipse.buildId=4.20.0.I20210611-1600 java.version=11.0.11 java.vendor=AdoptOpenJDK BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -refresh -product org.eclipse.epp.package.rcp.product -refresh -product org.eclipse.epp.package.rcp.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -refresh -clean -product org.eclipse.epp.package.rcp.product -data C:\development\smr-2021-06 -refresh -clean -product org.eclipse.epp.package.rcp.product org.eclipse.ui Error Fri Jun 18 10:35:26 CEST 2021 Unhandled event loop exception java.lang.ClassCastException: class org.eclipse.core.internal.resources.Project cannot be cast to class org.eclipse.core.resources.IFile (org.eclipse.core.internal.resources.Project and org.eclipse.core.resources.IFile are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @7a45b97c) at org.eclipse.team.internal.ui.actions.CompareAction.getElementFor(CompareAction.java:113) at org.eclipse.team.internal.ui.actions.CompareAction.execute(CompareAction.java:60) at org.eclipse.team.internal.ui.actions.TeamAction.run(TeamAction.java:567) at org.eclipse.team.internal.ui.actions.TeamAction.runWithEvent(TeamAction.java:603) at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:229) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:580) at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:414) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4209) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1043) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4026) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3626) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:654) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591) at org.eclipse.equinox.launcher.Main.run(Main.java:1462)
