The source editor crashes after removing tex code from fields.

[jonasstein]

JabRef 4.1-dev--snapshot--2017-10-31--master--1ebdea452
Linux 4.12.12-gentoo+ amd64 
Java 1.8.0_152

The source editor crashes after removing tex code from fields.

Perhaps linked to #3363?

Reproduce:

1. add DOI 10.1103/physrevlett.119.177201

2. remove {\hspace{0.167em}} as marked:
   
   save: Ctrl+S

3. view result in the source

it did not change! Source field is not editable any more!

4. Click on another article and back. The Source field is now empty:
   

5. Delete the article, Ctrl+S. The Source field does not appear on any other article. Jabref needs now a restart.

from the stderr:

22:33:16.259 [JavaFX Application Thread] ERROR org.jabref.FallbackExceptionHandler - Uncaught exception occurred in Thread[JavaFX Application Thread,5,main]
java.util.NoSuchElementException: No value present
	at java.util.OptionalInt.getAsInt(OptionalInt.java:118) ~[?:1.8.0_152]
	at org.fxmisc.flowless.VirtualFlow.hit(VirtualFlow.java:297) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.richtext.GenericStyledArea.hit(GenericStyledArea.java:941) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.richtext.StyledTextAreaBehavior.handleFirstPrimaryPress(StyledTextAreaBehavior.java:466) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputMapTemplate.lambda$consume$32(InputMapTemplate.java:107) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.PatternActionTemplate.lambda$null$44(InputMapTemplate.java:242) ~[JabRef--master--latest.jar:?]
	at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_152]
	at org.fxmisc.wellbehaved.event.template.PatternActionTemplate.lambda$getInputHandlerTemplateMap$45(InputMapTemplate.java:242) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputHandlerTemplateMap.lambda$sequence$39(InputHandlerTemplateMap.java:25) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputHandlerTemplateMap.lambda$sequence$39(InputHandlerTemplateMap.java:24) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputHandlerTemplateMap.lambda$sequence$39(InputHandlerTemplateMap.java:24) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputMapTemplate$HandlerTemplateConsumer$1.lambda$accept$29(InputMapTemplate.java:36) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.InputHandler.handle(InputHandler.java:15) ~[JabRef--master--latest.jar:?]
	at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218) ~[jfxrt.jar:?]
	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191) ~[jfxrt.jar:?]
	at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54) ~[jfxrt.jar:?]
	at javafx.event.Event.fireEvent(Event.java:198) ~[jfxrt.jar:?]
	at javafx.scene.Scene$MouseHandler.process(Scene.java:3757) ~[jfxrt.jar:?]
	at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485) ~[jfxrt.jar:?]
	at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762) ~[jfxrt.jar:?]
	at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494) ~[jfxrt.jar:?]
	at com.sun.javafx.tk.quantum.EmbeddedScene.lambda$null$293(EmbeddedScene.java:256) ~[jfxrt.jar:?]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_152]
	at com.sun.javafx.tk.quantum.EmbeddedScene.lambda$mouseEvent$294(EmbeddedScene.java:244) ~[jfxrt.jar:?]
	at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295) ~[jfxrt.jar:?]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_152]
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294) ~[jfxrt.jar:?]
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) ~[jfxrt.jar:?]
	at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method) ~[jfxrt.jar:?]
	at com.sun.glass.ui.gtk.GtkApplication.lambda$null$48(GtkApplication.java:139) ~[jfxrt.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]
22:33:17.059 [JavaFX Application Thread] ERROR org.jabref.FallbackExceptionHandler - Uncaught exception occurred in Thread[JavaFX Application Thread,5,main]
java.util.NoSuchElementException: No value present
	at java.util.OptionalInt.getAsInt(OptionalInt.java:118) ~[?:1.8.0_152]
	at org.fxmisc.flowless.VirtualFlow.hit(VirtualFlow.java:297) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.richtext.GenericStyledArea.hit(GenericStyledArea.java:941) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.richtext.StyledTextAreaBehavior.handleFirstPrimaryPress(StyledTextAreaBehavior.java:466) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputMapTemplate.lambda$consume$32(InputMapTemplate.java:107) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.PatternActionTemplate.lambda$null$44(InputMapTemplate.java:242) ~[JabRef--master--latest.jar:?]
	at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_152]
	at org.fxmisc.wellbehaved.event.template.PatternActionTemplate.lambda$getInputHandlerTemplateMap$45(InputMapTemplate.java:242) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputHandlerTemplateMap.lambda$sequence$39(InputHandlerTemplateMap.java:25) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputHandlerTemplateMap.lambda$sequence$39(InputHandlerTemplateMap.java:24) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputHandlerTemplateMap.lambda$sequence$39(InputHandlerTemplateMap.java:24) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.template.InputMapTemplate$HandlerTemplateConsumer$1.lambda$accept$29(InputMapTemplate.java:36) ~[JabRef--master--latest.jar:?]
	at org.fxmisc.wellbehaved.event.InputHandler.handle(InputHandler.java:15) ~[JabRef--master--latest.jar:?]
	at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218) ~[jfxrt.jar:?]
	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191) ~[jfxrt.jar:?]
	at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) ~[jfxrt.jar:?]
	at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54) ~[jfxrt.jar:?]
	at javafx.event.Event.fireEvent(Event.java:198) ~[jfxrt.jar:?]
	at javafx.scene.Scene$MouseHandler.process(Scene.java:3757) ~[jfxrt.jar:?]
	at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485) ~[jfxrt.jar:?]
	at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762) ~[jfxrt.jar:?]
	at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494) ~[jfxrt.jar:?]
	at com.sun.javafx.tk.quantum.EmbeddedScene.lambda$null$293(EmbeddedScene.java:256) ~[jfxrt.jar:?]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_152]
	at com.sun.javafx.tk.quantum.EmbeddedScene.lambda$mouseEvent$294(EmbeddedScene.java:244) ~[jfxrt.jar:?]
	at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295) ~[jfxrt.jar:?]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_152]
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294) ~[jfxrt.jar:?]
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) ~[jfxrt.jar:?]
	at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method) ~[jfxrt.jar:?]
	at com.sun.glass.ui.gtk.GtkApplication.lambda$null$48(GtkApplication.java:139) ~[jfxrt.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]

[tobiasdiez]

This should be fixed in the latest development version. Could you please check the build from http://builds.jabref.org/master/. Thanks!