[jira] [Created] (NETBEANS-3919) NB editor Null-pointer exception because of javac hints, with non-installed nb-javac plug-in

["Hans Grimmelshausen (Jira)" <ji...@apache.org>]

Hans Grimmelshausen created NETBEANS-3919:
---------------------------------------------

             Summary: NB editor Null-pointer exception because of javac hints, with non-installed nb-javac plug-in
                 Key: NETBEANS-3919
                 URL: https://issues.apache.org/jira/browse/NETBEANS-3919
             Project: NetBeans
          Issue Type: Bug
          Components: editor - Hints & Annotations, editor - Parsing & Indexing
    Affects Versions: 11.2, 11.0, 11.3
         Environment: Netbeans 11.2 and 11.3_beta
Ubuntu 18.04 LTS
OpenJDK 11.0.6 2020-01-14 (via apt-get installed)
            Reporter: Hans Grimmelshausen
         Attachments: Nullpointer-javac-hints.txt

Short description: In NB 11.2, with uninstalled nb-javac plug-in and enabled "Overrides" editor hint, whilst editing a Java source file containing "Overrides" situations, a few seconds later NB raises a Null-pointer exception. Please see attached stacktrace.

How to reproduce the bug step by step:

1) I use Netbeans Ant projects with Java 11 source-format, but the bug could also happen with other project types.

2) When NB asks to install nb-javac plugin, don't install it. In case it's already installed, un-install it. With enabled nb-javac plugin, the Null-pointer exception bug doesn't happen. (Also the refactoring-rename only works fully with an non-installed nb-javac plug-in.)

3) In NB's menu Tools -> Options -> Editor -> Hints -> Java, in section "Standard javac warnings", enable the "Overrides" checkbox.

4) Create a simple mini Java source file with offending source code lines, like:

 
{code:java}
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JCheckBox;
public class Test {
   public static void main(String[] parameter)  {
      JCheckBox jChecker = new JCheckBox();
      jChecker.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent evt) {
         }
      });
   }
}{code}
 

5) Now whenever we edit some of the code in the source file, a few seconds later, when NB's parser wants to check the source code for potential "Overrides" hint situations, it raises the red Null-pointer exception notification.

7) Work-around: Disable the "Overrides" checkbox in the NB editor's hints section.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@netbeans.apache.org
For additional commands, e-mail: commits-help@netbeans.apache.org

For further information about the NetBeans mailing lists, visit:
https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists