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Build 1087 and 18 ----------------- Steps to reproduce: 1. Open the object browser. Ensure that two packages in the packages pane contain many classes. 2. Select one of these packages but don't wait till the objects pane will be filled and switch to the second package. Again do not wait very long and switch back. Repeat this several times. The following exceptions are thrown. In the build 1087 the Exception 1 is thrown. In the build 18 the Exception 2 is thrown. After these exceptions the Exception 3 is thrown. After Exception 3 the Exception 4 is thrown several times.
Created attachment 119 [details] Exception 1
Created attachment 121 [details] Exception 3
[1151] Occur also after switching Interface, Class filters on/off even if done slowly enough..:)
I am closing all reports in category Java/Unsupported as wontfix. These should be dead issues --- if the reported cases are against some live part of the NetBeans IDE please reopen and we can discuss to which category they belong.