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More or less clean userdir, fresh build, b57. Opening apisupport/project, attached CME is thrown. Seems to be random. Probably consequences of integrations from issue 66404.
Created attachment 26848 [details] cme
No, older than that I think.
committed Up-To-Date 1.22 apisupport/project/src/org/netbeans/modules/apisupport/project/universe/ModuleList.java