Denis Golovin created JBIDE-18062: ------------------------------------- Summary: java.lang.ClassCastException: org.eclipse.ui.internal.part.NullEditorInput cannot be cast to org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput Key: JBIDE-18062 URL: https://issues.jboss.org/browse/JBIDE-18062 Project: Tools (JBoss Tools) Issue Type: Bug Components: central Affects Versions: 4.2.0.Beta3 Reporter: Denis Golovin Assignee: Denis Golovin Fix For: 4.2.0.CR1 Happens sometime for me, but I didn't notice steps to replicate. {code}java.lang.ClassCastException: org.eclipse.ui.internal.part.NullEditorInput cannot be cast to org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput at org.jboss.tools.maven.sourcelookup.ui.actions.AttachSourcesActionDelegate.setActiveEditor(AttachSourcesActionDelegate.java:79) at org.eclipse.ui.internal.EditorPluginAction.editorChanged(EditorPluginAction.java:77) at org.eclipse.ui.internal.EditorActionBuilder$EditorContribution.editorChanged(EditorActionBuilder.java:86) at org.eclipse.ui.internal.EditorActionBuilder$ExternalContributor.setActiveEditor(EditorActionBuilder.java:135) at org.eclipse.ui.internal.EditorActionBars.partChanged(EditorActionBars.java:357) at org.eclipse.ui.internal.WorkbenchPage.updateActivations(WorkbenchPage.java:298) at org.eclipse.ui.internal.WorkbenchPage.access$17(WorkbenchPage.java:280) at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:202) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$3.run(PartServiceImpl.java:234) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:231) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:682) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:613) at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:106) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$9.handleEvent(StackRenderer.java:1017) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4487) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1412) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1397) at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1714) at org.eclipse.swt.widgets.Control.gtk_button_press_event(Control.java:3024) at org.eclipse.swt.widgets.Control.gtk_button_press_event(Control.java:2960) at org.eclipse.swt.widgets.Composite.gtk_button_press_event(Composite.java:723) at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2077) at org.eclipse.swt.widgets.Control.windowProc(Control.java:5510) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4701) at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method) at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9074) at org.eclipse.swt.widgets.Display.eventProc(Display.java:1253) at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method) at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2473) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3439) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1152) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1033) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) 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:382) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438){code} -- This message was sent by Atlassian JIRA (v6.2.6#6264)