[Linux] Tab navigation skips a tab

[fedejeanne]

@sadiesue43 I just realized that you are running Ubuntu and not Windows. The 3rd issue you reported is different from the one originally reported here and I just ran into it while testing #4190 in WSL.

I am reporting it separately to avoid polluting this issue with it.

Originally posted by @fedejeanne in #4135

---

The problem

Important

I noticed this while testing for Linux (using WSL on Windows). The problem is not reproducible on Windows. I haven't tested on Mac.

Navigating with the keys Ctrl + PgUp / Ctrl + PgDn sometimes skips a tab.

Here is a video showing the issue in Eclipse 2025-09 / 4.37

The stack traces show that the issue is a duplicated event that reaches the TraversePageHandler.

Stack-trace Nr. 1

java.lang.Exception: Stack trace
	at java.base/java.lang.Thread.dumpStack(Thread.java:2210)
	at org.eclipse.ui.internal.handlers.TraversePageHandler.execute(TraversePageHandler.java:42)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:277)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:98)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:301)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:233)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:174)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:165)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:484)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.handleCommandExecution(KeyBindingDispatcher.java:331)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.lambda$0(KeyBindingDispatcher.java:320)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:131)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:5068)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4528)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1051)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:583)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:193)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1415)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1387)

Stack-Trace Nr. 2

java.lang.Exception: Stack trace
	at java.base/java.lang.Thread.dumpStack(Thread.java:2210)
	at org.eclipse.ui.internal.handlers.TraversePageHandler.execute(TraversePageHandler.java:42)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:277)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:98)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:301)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:233)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:174)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:165)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:484)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.handleCommandExecution(KeyBindingDispatcher.java:331)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:322)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:590)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:671)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:460)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:104)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:91)
	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1990)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1658)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1685)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1668)
	at org.eclipse.swt.widgets.Control.traverse(Control.java:6725)
	at org.eclipse.swt.widgets.Control.translateTraversal(Control.java:6703)
	at org.eclipse.swt.widgets.Composite.translateTraversal(Composite.java:1923)
	at org.eclipse.swt.widgets.Control.gtk3_key_press_event(Control.java:4055)
	at org.eclipse.swt.widgets.Composite.gtk3_key_press_event(Composite.java:973)
	at org.eclipse.swt.widgets.Tree.gtk3_key_press_event(Tree.java:2356)
	at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2657)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:6900)
	at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:4252)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6190)
	at org.eclipse.swt.internal.gtk3.GTK3.gtk_main_iteration_do(Native Method)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4522)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1051)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:583)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:193)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1415)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1387)