Convert an empty field from Latex to Unicode throws an exception

[HoussemNasri]

JabRef version

Latest development branch build (please note build date below)

Operating system

Windows

Details on version and operating system

No response

Checked with the latest development build

• I made a backup of my libraries before testing the latest development version.
• I have tested the latest development version and the problem persists

Steps to reproduce the behaviour

1. Select an entry by double-clicking.
2. Right-click on an empty field from the entry editor.
3. Select Convert then LaTeX to Unicode.

An exception is also raised when using the other conversion options (HTML to LaTeX...).

Appendix

Log File

java.lang.NullPointerException
	at java.base/java.util.Objects.requireNonNull(Objects.java:208)
	at org.jabref@100.0.0/org.jabref.model.strings.LatexToUnicodeAdapter.format(LatexToUnicodeAdapter.java:29)
	at org.jabref@100.0.0/org.jabref.logic.layout.format.LatexToUnicodeFormatter.format(LatexToUnicodeFormatter.java:26)
	at org.jabref@100.0.0/org.jabref.gui.fieldeditors.contextmenu.DefaultMenu.lambda$getConversionMenu$1(DefaultMenu.java:66)
	at javafx.base@19/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
	at javafx.base@19/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
	at javafx.base@19/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
	at javafx.base@19/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
	at javafx.base@19/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base@19/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
	at javafx.base@19/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
	at javafx.base@19/javafx.event.Event.fireEvent(Event.java:198)
	at javafx.controls@19/javafx.scene.control.MenuItem.fire(MenuItem.java:459)
	at javafx.controls@19/com.sun.javafx.scene.control.ContextMenuContent$MenuItemContainer.lambda$createNodeMenuItemChildren$14(ContextMenuContent.java:1407)
	at javafx.base@19/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
	at javafx.base@19/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
	at javafx.base@19/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
	at javafx.base@19/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
	at javafx.base@19/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
	at javafx.base@19/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
	at javafx.base@19/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base@19/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base@19/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base@19/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base@19/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base@19/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base@19/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base@19/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base@19/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base@19/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
	at javafx.base@19/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
	at javafx.base@19/javafx.event.Event.fireEvent(Event.java:198)
	at javafx.graphics@19/javafx.scene.Scene$ClickGenerator.postProcess(Scene.java:3599)
	at javafx.graphics@19/javafx.scene.Scene$MouseHandler.process(Scene.java:3903)
	at javafx.graphics@19/javafx.scene.Scene.processMouseEvent(Scene.java:1887)
	at javafx.graphics@19/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2620)
	at javafx.graphics@19/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
	at javafx.graphics@19/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at javafx.graphics@19/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450)
	at javafx.graphics@19/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)
	at javafx.graphics@19/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
	at javafx.graphics@19/com.sun.glass.ui.View.handleMouseEvent(View.java:551)
	at javafx.graphics@19/com.sun.glass.ui.View.notifyMouse(View.java:937)
	at javafx.graphics@19/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at javafx.graphics@19/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)
	at java.base/java.lang.Thread.run(Thread.java:833)

[TheGor1lla]

Had a quick look at the code, what would be the desired outcome of the format operation?

Personally I'd return an empty String instead. Would that be okay, if so I can do that