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https://issues.apache.org/jira/browse/NETBEANS-2240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16790785#comment-16790785
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Thomas Kellerer commented on NETBEANS-2240:
-------------------------------------------
In my attempt to isolate the problem into an independent Maven project, it
turned out that the project itself isn't the problem.
I switched to a different project group where the same project was open and
suddenly the refactoring worked without problems. So I re-created
(delete/create) my original project group and now the refactoring works there
as well.
Unfortunately, I wasn't smart enough to make a backup of my (defunct) project
group, but maybe that information helps. I might be that there were some
invalid paths stored in project group (as I moved around stuff in the file
system).
> NPE thrown when refactoring a class
> -----------------------------------
>
> Key: NETBEANS-2240
> URL: https://issues.apache.org/jira/browse/NETBEANS-2240
> Project: NetBeans
> Issue Type: Bug
> Components: java - Source
> Affects Versions: 11.0
> Reporter: Thomas Kellerer
> Priority: Major
> Attachments: CommentsTest.dump, messages.log
>
>
> Whenever I refactor a class (e.g rename, move), or public methods of a class
> NB 11 throws a NPE.
> This is a multi-module Maven project.
> The Java source that is mentioned in the error message is always a test class
> using TestNG. I don't seem to get that error with projects that do not use
> TestNG.
> Doing the refactoring with NetBeans 10 on the same project works without
> problems.
> Due to legal reasons I can not attach the source code that is part of the
> dump file - I had to remove everything related to the "real" source and tried
> to replace some path names revealing private information. I hope the files
> are useful nevertheless
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