Redcar redcar

I can get this "every so often" when I load a file from the command line, into a Redcar instance running in the background that doesn't have any windows open (hard crash):

continuing to run to wait for incoming drb connections later

org.eclipse.swt.SWT:-1:in error': java.lang.IllegalArgumentException: Index out of bounds (NativeException)<br/>

    from org.eclipse.swt.SWT:-1:in `error'
    from org.eclipse.swt.SWT:-1:in `error'
    from org.eclipse.swt.custom.StyledText:-1:in `getOffsetAtLine'
    from com/redcareditor/mate/MateText.java:542:in `getHoverInfo'
    from org/eclipse/jface/text/source/AnnotationBarHoverManager.java:382:in `computeInformation'
    from org/eclipse/jface/text/AbstractInformationControlManager.java:1120:in `doShowInformation'
    from org/eclipse/jface/text/AbstractHoverInformationControlManager.java:519:in `mouseHover'
    from org.eclipse.swt.widgets.TypedListener:-1:in `handleEvent'
    from org.eclipse.swt.widgets.EventTable:-1:in `sendEvent'
    from org.eclipse.swt.widgets.Widget:-1:in `sendEvent'
    from org.eclipse.swt.widgets.Display:-1:in `runDeferredEvents'
    from org.eclipse.swt.widgets.Display:-1:in `readAndDispatch'
    from D:/installs/ruby-1.9.2-p0-i386-mingw32/lib/ruby/gems/1.9.1/gems/redcar-0.10/plugins/swt/lib/swt/event_loop.rb:13:in `start'
    from D:/installs/ruby-1.9.2-p0-i386-mingw32/lib/ruby/gems/1.9.1/gems/redcar-0.10/plugins/core/lib/core/gui.rb:39:in `start'
    from D:/installs/ruby-1.9.2-p0-i386-mingw32/lib/ruby/gems/1.9.1/gems/redcar-0.10/lib/redcar.rb:184:in `pump'
    from D:/installs/ruby-1.9.2-p0-i386-mingw32/lib/ruby/gems/1.9.1/gems/redcar-0.10/bin/redcar:30