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I feel like this was filed somewhere else, but I cannot find it now. 20141201 but has been happening for a long time. If I try to open a Java source generated by the Groovy stub compiler Maven plugin such as github.com/jenkinsci/jenkins/core/target/generated-test-sources/groovy-stubs/hudson/util/SecretTest.java in the editor, a tab opens with the correct icon, but no title and no content (just a blank gray area). (Sometimes it initially opens correctly, but then the title disappears from the tab—while leaving the editor content.) jenkinsci/jenkins/core/target/generated-sources/localizer/hudson/cli/Messages.java (created by a different plugin) opens correctly. I currently have the Groovy plugin disabled (since there is no version on the update center compatible with dev versions of the IDE); the behavior is the same when it is enabled. The log file has some messages (not from a Logger!) like File: /…/jenkinsci/jenkins/core/target/generated-test-sources/groovy-stubs/hudson/util/SecretTest.java StartOffset: 1,258 as well as warnings like INFO [org.netbeans.core.windows.view.ui.TabbedHandler]: TopComponent has no icon: MVCTC[name=, peer=[model=current=org.netbeans.core.spi.multiview.MultiViewFactory$MapMVD@1d8e4190]] and WARNING [org.netbeans.modules.java.source.parsing.JavacParser]: Invalid or deleted file: /…/jenkinsci/jenkins/core/target/generated-test-sources/groovy-stubs/hudson/util/SecretTest.java