This bug was originally marked as duplicate of bug 267235, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE Dev (Build 201608050002)
VM: Java HotSpot(TM) 64-Bit Server VM, 25.60-b23, Java(TM) SE Runtime Environment, 1.8.0_60-b27
OS: Windows 10

User Comments:
nleck: Navigate to

nleck: reporting error

zmirc: Pressed CTRL + Click on a Java Class name to take me to that class.

muellermi: More precise: The bug appears every time hitting the at sign of an annotation (tested with cdi annotations only). Because the identation, mostly theses are the class annotations....

GUEST: Its not frequent but happens mostly for any one or all of these actions

Undo, Redo, Select multiline code

jomu: edit method annotation

ehsavoie: Opeining file with conflicts after a rebase

GUEST: Ctrl + Z.

Alniks: while writing a unit test

hmichel: Navigating inside a Java file

paolosca: Editing a PHP file

mclaborn: (I think) Ctrl + alt + click on a method to get to a subclass implementation

GUEST: selecting multiple lines of code (ow, and if you wan't me to stop reporting this every time please fix it, you claim this has been fixed in 201607270002, it very clearly isn't!!!)

zeloras: id ont know, just paste htmlspecialchars_decode

ytn01: While debuggin a java application, exection was suspended at a breakpoint hit.
During this, I Clicked middle mouse button on a method call code to navigate to its definition.
Then exception popped up.

gtzabari: Compiled class. Exception thrown.

GUEST: selecting code to indent

GUEST: moving trough code with arrow keys

GUEST: move cursor with arrows in src

ytn01: Installed Netbeans daily build of the day.
Launched it,... projects from last session opened, along with files from previous session.
Editor was on Start Page tab, and background project scanning was running.
I closed the start page tab.
As editor was switching to next tab, exception got thrown.

My editor setting has option to collapse code blocks turned on.
Dupicates of this exception kept getting thrown until background project scanning finished.

muellermi: I have to correct myself: Whilst moving up with the arrow ke, the bug does not appear when bouncing the file.

The bug appears moving up or down, when the current position reaches one of theses CDI annotations:

@Named
@RequestScoped

mkhramov: Edit java code

Alniks: editing java file

GUEST: just working, nothing special

GUEST: ?

mrpc: Tried to select some lines of code to delete them

GUEST: still removing content using ctrl+z

GUEST: moving arround with some code

GUEST: Cause Uknown

Alniks: tried to open method in java file

muellermi: Problem still exists. Occured whilst opening the file after NB restart.

nleck: na

alexvsimon: goto type

GUEST: Ctrl+Click on a Java class name to navigate to it

GUEST: typing php code

muellermi: move up within editor (cantent scrolls whilst keeping up-arrow pressed)

GUEST: ...

Alniks: opening method through navigator

IrianR: Opening an auto generated class.

GUEST: Something error

tmysik: editing php file

nleck: editing

zmirc: Pressed CTRL + Click on a Java class name to take me to that class

dasprid: .

GUEST: M

nleck: rename

GUEST: 1) open heap dump
2) go to OQL Console
3) use following OQL:
select toHtml(x)+" "+toHtml(x.id) from org.netbeans.modules.masterfs.filebasedfs.naming.FolderName x 
4) type '.' after x.id

alied: Opened a class from the "Open Type" dialog (Ctrl+O)

GUEST: removing content using ctrl+z in another file

GUEST: duplicate line

GUEST: Just generally happening while navigating documents.

muellermi: every time a curser movement hit an @

nleck: rename

mclaborn: Double clicked a method name in the Navigator view to position to it in the editor window.

muellermi: edit Java

IrianR: Clicked on a method in the navigfator window.

GUEST: moved to line with a tab and } using arrow keys

GUEST: I am fucking trying to work!!!

GUEST: ctrl+z in file number 3 (yep, made a mistake in some code)

GUEST: Clicked an injected class

GUEST: entry key down.

ytn01: This happens everytime I launch IDE and projects and bunch of java files get opened from last session.
I switch to services tab, start java db.
close the IDE's start page.
Exception gets thrown.

muellermi: edit Java

luisoskite: only click a label

muellermi: and this problem occurs whilst clean and build....

GUEST: down key down.

GUEST: move cursor to start line

alied: Navigated to a method in a non-opened class by Ctrl+Click

GUEST: Using Ctrl + Z

GUEST: -

gtzabari: I don't remember what I did.

GUEST: very consistent (2 more to go, won't report them)

jockel: Jumped into a class via CTRL+mouseclick

nleck: nav

zmirc: Just switching to a tab (containing a Java class)

GUEST: yep, it is consistent

GUEST: used ctrl+x

GUEST: HOW MANY FUCKING MORE TIMES DO I HAVE TO REPORT THIS???

GUEST: ?

vidhyadharantechdays: Deploying maven project i got this error

alied: Opening a class from the "Open Type" dialog (Ctrl+O)

bolsover: Navigating to source of referenced class

nleck: nav

GUEST: reaching a line containing tabs followed by } using arrow down

dasprid: Opened a PHP file.

GUEST: CTRL+S with reindent

mclaborn: Arrow up in a Java file

dasprid: Tried to save a PHP file.

GUEST: ?

GUEST: Moving ina Java file

IrianR: Opening a class from go to type results

alied: just opened a class from Open Type dialog (Ctrl+O)

GUEST: Cause Uknown

vercinstex: code completion

GUEST: copy pasted something

vasouv: Was testing the Glassfish 4.1 integration NetCAT tests.

Steps:
Add SessionBean
Add Servlet
In Servlet, invoke Code Insert > Call EJB.

abien: Happened during navigation through code

nleck: nav

nleck: navigate

GUEST: Just opening a JMS Java file

gtzabari: Nto sure what I did.

alied: Crl-Clicked on a class declaration to go to that type's file in the editor.




Stacktrace: 
java.lang.NullPointerException
   at org.netbeans.modules.editor.hints.HintsUI$4$1.run(HintsUI.java:1035)
   at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1419)
   at org.netbeans.modules.editor.hints.HintsUI$4.run(HintsUI.java:1031)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)