[jboss-jira] [JBoss JIRA] (DROOLS-2343) [DMN Designer] Closing Context editor causes error

[ https://issues.jboss.org/browse/DROOLS-2343?page=com.atlassian.jira.plugi... ] Michael Anstis commented on DROOLS-2343: ---------------------------------------- *Navigating to DMN "level 2" editor* (Disables Stunner session as it provides its own keyboard etc handler) {{AbstractClientSession.pause()}} - calls {{CanvasControlRegistrationHandler.disable()}} - calls {{CanvasControl.disable()}} - calls {{AbstractCanvasHandlerControl.disable()}} - calls {{AbstractCanvasHandlerControl.doDisable()}} - calls {{LocationControlImpl.doDisable()}} - {{AbstractCanvasHandlerControl}} then sets {{canvasHandler}} to {{null}} *Closing editor* {{SessionDiagramEditorScreen.destroySession()}} - calls {{AbstractSessionPresenter.destroy()}} - calls {{AbstractClientSessionManager.destroy()}} - calls {{AbstractClientSession.doDestroy()}} Then follows the same as above for when pausing a session - calls {{CanvasControlRegistrationHandler.disable()}} - calls {{CanvasControl.disable()}} - calls {{AbstractCanvasHandlerControl.disable()}} - calls {{AbstractCanvasHandlerControl.doDisable()}} - calls {{LocationControlImpl.doDisable()}} - {{LocationControlImpl}} attempts to access {{canvasHandler}} properties however it is {{null}} So, basically, when a Control is disabled and a subsequent attempt follows to disable it then don't! -- This message was sent by Atlassian JIRA (v7.5.0#75005)