[jbosstools-issues] [JBoss JIRA] (JBIDE-22921) IllegalArgumentException below MozillaEditor.dispose (thrown in ListenerList.remove)

IllegalArgumentException below MozillaEditor.dispose (thrown in ListenerList.remove) ------------------------------------------------------------------------------------ Key: JBIDE-22921 URL: https://issues.redhat.com/browse/JBIDE-22921 Project: Tools (JBoss Tools) Issue Type: Bug Components: visual-page-editor-core Reporter: Automated Error Reporting Bot Assignee: Ilya Buziuk Priority: Major Fix For: 4.16.x The following problem was reported via the automated error reporting: Message: HIDDEN {noformat} java.lang.IllegalArgumentException: null at org.eclipse.core.runtime.ListenerList.remove(ListenerList.java:155) at org.eclipse.core.commands.common.EventManager.removeListenerObject(EventManager.java:99) at org.eclipse.ui.preferences.ScopedPreferenceStore.removePropertyChangeListener(ScopedPreferenceStore.java:496) at org.jboss.tools.vpe.editor.mozilla.MozillaEditor.dispose(MozillaEditor.java:681) at org.jboss.tools.vpe.editor.mozilla.MozillaPreview.dispose(MozillaPreview.java:238) at org.jboss.tools.vpe.editor.VpeEditorPart.dispose(VpeEditorPart.java:918) at org.jboss.tools.jst.web.ui.internal.editor.jspeditor.JSPMultiPageEditor.dispose(JSPMultiPageEditor.java:708) at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.invalidate(CompatibilityPart.java:238) at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.destroy(CompatibilityPart.java:394) at sun.reflect.NativeMethodAccessorImpl.invoke0(null:-2) at sun.reflect.NativeMethodAccessorImpl.invoke(null:-1) at sun.reflect.DelegatingMethodAccessorImpl.invoke(null:-1) at java.lang.reflect.Method.invoke(null:-1) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) {noformat} Bundles: | org.eclipse.core.commands | 3.7.0.v20150422-0725 | 3.8.0.v20160316-1921 | | org.eclipse.core.runtime | 3.11.0.v20150405-1723 | 3.12.0.v20160222-1238 | | org.eclipse.e4.core.di | 1.5.0.v20150421-2214 | 1.6.0.v20160211-1614 | | org.eclipse.ui | 3.107.0.v20150507-1945 | 3.107.0.v20160108-0627 | | org.jboss.tools.jst.web.ui | 3.7.1.Final-v20160331-0256-B96 | 3.7.1.Final-v20160331-0256-B96 | | org.jboss.tools.vpe | 3.7.1.Final-v20160331-0327-B91 | 3.7.1.Final-v20160331-0327-B91 | Operating Systems: | Linux | 2.6.32.18 | 4.5.6.fc23 | | Windows | 6.1.0 | 10.0.0 | The above information is a snapshot of the collected data. Visit [this page|https://redhat.ctrlflow.com/reviewers/#!/problems/57170671e4b052a77c...] for the latest data. Thank you for your assistance. Your friendly error-reports-inbox.