Bug 567312 - Eclipse UI behaving strangely when a plug-in is no longer installed
Summary: Eclipse UI behaving strangely when a plug-in is no longer installed
Status: REOPENED
Alias: None
Product: Platform
Classification: Eclipse Project
Component: UI (show other bugs)
Version: 4.17   Edit
Hardware: PC Mac OS X
: P3 normal (vote)
Target Milestone: ---   Edit
Assignee: Platform-UI-Inbox CLA
QA Contact:
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Reported: 2020-09-24 04:59 EDT by Gunnar Wagenknecht CLA
Modified: 2020-09-24 06:03 EDT (History)
1 user (show)

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Eclipse Log file (831.04 KB, text/plain)
2020-09-24 04:59 EDT, Gunnar Wagenknecht CLA 		no flags Details
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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.