Top menu item "View" throws exception when hoovered/opened

[ytzemih]

JabRef 5.1--2020-05-07--a5412b3
Linux 5.4.19-050419-generic amd64
Java 14.0.1

• I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

Steps to reproduce the behavior:

1. Top menu item "View" throws the following exception when hovered.
2. After the exception, JabRef remains usable, just the "View" submenu can't be dropped down/opened anymore.

I am not always able to reproduce this but I've seen this exception a few times in the last couple of weeks before reporting it. (Just updated to the newest JR devsnapshot and will post an update to this issue when it reoccurs.)

java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at java.base/jdk.internal.util.Preconditions.outOfBounds(Unknown Source) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Unknown Source) at java.base/jdk.internal.util.Preconditions.checkIndex(Unknown Source) at java.base/java.util.Objects.checkIndex(Unknown Source) at java.base/java.util.ArrayList.get(Unknown Source) at org.jabref.merged.module/com.sun.javafx.collections.ObservableListWrapper.get(Unknown Source) at org.jabref/org.jabref.gui.actions.ActionHelper.isFilePresentForSelectedEntry(Unknown Source) at org.jabref/org.jabref.gui.documentviewer.ShowDocumentViewerAction.(Unknown Source) at org.jabref/org.jabref.gui.JabRefFrame.lambda$createMenu$13(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventUtil.fireEvent(Unknown Source) at org.jabref.merged.module/javafx.event.Event.fireEvent(Unknown Source) at org.jabref.merged.module/javafx.scene.control.Menu.setShowing(Unknown Source) at org.jabref.merged.module/javafx.scene.control.Menu.show(Unknown Source) at org.jabref.merged.module/javafx.scene.control.skin.MenuBarSkin.showMenu(Unknown Source) at org.jabref.merged.module/javafx.scene.control.skin.MenuBarSkin.showMenu(Unknown Source) at org.jabref.merged.module/javafx.scene.control.skin.MenuBarSkin.lambda$rebuildUI$29(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventUtil.fireEvent(Unknown Source) at org.jabref.merged.module/javafx.event.Event.fireEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.event.EventQueue.fire(Unknown Source) at org.jabref.merged.module/javafx.scene.Scene$MouseHandler.handleEnterExit(Unknown Source) at org.jabref.merged.module/javafx.scene.Scene$MouseHandler.process(Unknown Source) at org.jabref.merged.module/javafx.scene.Scene.processMouseEvent(Unknown Source) at org.jabref.merged.module/javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source) at org.jabref.merged.module/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source) at org.jabref.merged.module/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source) at java.base/java.security.AccessController.doPrivileged(Unknown Source) at org.jabref.merged.module/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(Unknown Source) at org.jabref.merged.module/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(Unknown Source) at org.jabref.merged.module/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source) at org.jabref.merged.module/com.sun.glass.ui.View.handleMouseEvent(Unknown Source) at org.jabref.merged.module/com.sun.glass.ui.View.notifyMouse(Unknown Source) at org.jabref.merged.module/com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method) at org.jabref.merged.module/com.sun.glass.ui.gtk.GtkApplication.lambda$runLoop$11(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source)

[Siedlerchr]

Thank you for reporting this issue. We think, that is already fixed in our development version and consequently the change will be included in the next release.

We would like to ask you to use a development build from https://builds.jabref.org/master and report back if it works for you. Please remember to make a backup of your library before trying-out this version.