Bug 567312

Summary: Eclipse UI behaving strangely when a plug-in is no longer installed
Product: [Eclipse Project] Platform Reporter: Gunnar Wagenknecht <gunnar>
Component: UIAssignee: Platform-UI-Inbox <Platform-UI-Inbox>
Status: REOPENED --- QA Contact:
Severity: normal    
Priority: P3 CC: Lars.Vogel
Version: 4.17   
Target Milestone: ---   
Hardware: PC   
OS: Mac OS X   
Whiteboard:
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Description Gunnar Wagenknecht CLA 2020-09-24 04:59:39 EDT
Created attachment 284245 [details]
Eclipse Log file

Once upon a time I had org.eclipse.e4.tools.spy installed in my workspace. I recently upgraded to Eclipse 4.17.

My workspace seems to confuse Eclipe 4.17 quite a bit. For example, I noticed that in my Java perspective a lot of the Close buttons/icons were missing in the view tabs. I could not reset the perspective. I could close them all and re-open them again. Now I do have Close buttons.

However, now the toolbar has been reset. Thus, I went to the customize menu and tried to modify the toolbar. I was able to make all the changes except I could not "Apply" them. The "Apply and Close" button just did not work.

Inspecting the Error Log I noticed a bunch of similar exeptions.

I believe that Eclipse should *never* fail in such a confusing and terrible way if a plug-in is not there anymore. 

I believe I reported similar issues before. I did not see those issues in 4.16. Is this a regression that should be covered by a test?

Log attached.
Comment 1 Lars Vogel CLA 2020-09-24 05:07:41 EDT

*** This bug has been marked as a duplicate of bug 567054 ***
Comment 2 Gunnar Wagenknecht CLA 2020-09-24 06:03:09 EDT
Lars, I believe the missing close button was a symptom if not a different issue. The main issue is that I still cannot customize the perspective. "Apply and Close" button is not working in that dialog.