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steps to reproduce: - have projects view visible - open file in the editor - click on empty space in projects view this will result in File.isFile call for selected node, see attached stacktrace
Created attachment 124695 [details] stacktrace
correction: - also in projects view have selected a file that is not opened in the editor
It looks like the problem is that we recreate DataEditorSupport on every editor focus lost if other file is selected in projects view just to check that there is EditorCookie in the actions global context. See also bug 210416
I think this case was already fixed by Jarda as 218760. Marking as duplicate. *** This bug has been marked as a duplicate of bug 218760 ***