This happened sometimes on Netbeans 8.1 but when I updated to Netbeans 8.2 it seems to be a constant issue, that is going to force me to be unable to use the IDE for this project.

When editing an HTML file (it's actually a .hbs file that I assigned to being HTML, dunno if this matters) you are incapable of typing "{{" on any line in the editor.

I tried to circumvent this by copying a pre-existing "{{" and paste it, then I went to type in "link-to" but it refused to allow the hyphen to be typed.

I tried several more times then I hit backspace and was shocked as the editor inserted empty lines below the current one each time backspace was pressed.

I was not able to replicate this issue upon restarting Netbeans, however, the inability to type "{{link-to" remains as it will not allow the second left curly brace or the dash between link and to after copying, then I noticed the following exception is occurring while trying to do the second curly brace, and this happens all the time, even upon restarting the IDE:

java.lang.NullPointerException
	at org.netbeans.lib.lexer.inc.TokenListListUpdate.createJoinTokenListChange(TokenListListUpdate.java:284)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate$UpdateItem.update(TokenHierarchyUpdate.java:327)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.processLevelInfos(TokenHierarchyUpdate.java:225)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.updateImpl(TokenHierarchyUpdate.java:196)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.update(TokenHierarchyUpdate.java:134)
	at org.netbeans.lib.lexer.TokenHierarchyOperation.textModified(TokenHierarchyOperation.java:605)
	at org.netbeans.spi.lexer.TokenHierarchyControl.textModified(TokenHierarchyControl.java:96)
	at org.netbeans.lib.lexer.inc.DocumentInput.textModified(DocumentInput.java:152)
	at org.netbeans.lib.lexer.inc.DocumentInput.removeUpdate(DocumentInput.java:145)
	at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.removeUpdate(PriorityDocumentListenerList.java:116)
	at javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:259)
	at org.netbeans.editor.BaseDocument.fireRemoveUpdate(BaseDocument.java:1662)
	at org.netbeans.editor.BaseDocumentEvent.undo(BaseDocumentEvent.java:287)
	at org.netbeans.editor.GuardedDocumentEvent.undo(GuardedDocumentEvent.java:72)
	at org.netbeans.modules.editor.lib2.document.StableCompoundEdit.undo(StableCompoundEdit.java:93)
	at org.netbeans.editor.BaseDocument$AtomicCompoundEdit.undo(BaseDocument.java:2322)
	at org.netbeans.editor.BaseDocument.undoAtomicEdits(BaseDocument.java:2228)
	at org.netbeans.editor.BaseDocument.breakAtomicLock(BaseDocument.java:1835)
	at org.netbeans.editor.GuardedDocument.runAtomicAsUser(GuardedDocument.java:362)
	at org.netbeans.editor.BaseKit$DefaultKeyTypedAction.actionPerformed(BaseKit.java:1256)
	at org.netbeans.editor.ext.ExtKit$ExtDefaultKeyTypedAction.actionPerformed(ExtKit.java:1080)
	at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:347)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2929)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
	at java.awt.Component.processEvent(Component.java:6310)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4889)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)
	at java.awt.Component.dispatchEventImpl(Component.java:4760)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
[catch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)