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Created attachment 94705 [details] Exception Ant projects. NetBeans RCP app project with Branding Customizer open. Closing the projects, raises exception. See the last exception in the attached messages.log.
fixed core-main 6f3a4542c37d
Integrated into 'main-golden', will be available in build *201003050200* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main/rev/6f3a4542c37d User: S. Aubrecht <saubrecht@netbeans.org> Log: #181463 - invoke winsys apis from EDT only