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I observed my IDE retaining projects long after they had been closed, and analyzed a heap dump. One of the problems: <a project> <- ... <- ProjectsRootNode.BadgingNode <- VCSContext <- ShareMenu <- <main menu bar> I cannot quite follow how ShareMenu is supposed to work, but this seems to be a singleton menu, so it must never hold a strong reference to anything which might be related to a project.
the same for export/recover/show/mergemenu
fixed #bdc40bdb16e9
Not sure what repo that is in. Is this now RESOLVED/FIXED?
http://hg.netbeans.org/rev/bdc40bdb16e9
http://hg.netbeans.org/cdev/rev/bdc40bdb16e9