Using Neon.1a & 2.9.2.xx-201611160028-e46.

I associated "Jenkinsfile" with the groovy editor. When I select the entire file and press Ctrl+i, nothing happens, but I see this in the log:

Caused by: java.lang.ClassCastException: org.eclipse.jdt.internal.core.CompilationUnit cannot be cast to org.codehaus.jdt.groovy.model.GroovyCompilationUnit
at org.codehaus.groovy.eclipse.refactoring.actions.FormatGroovyAction.run(FormatGroovyAction.java:70)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:249)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:473)
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:118)
... 55 more