Redcar redcar

How to reproduce:
open a file with dos "\r\n", highlight text "at the end of the file, and up to the very last spot" (leave caret at end of file).
Now choose "save as" and choose a new filename.

Result: new file is saved, but tab becomes uneditable.

error in sync exec
java.lang.IllegalArgumentException: Argument not valid
org.eclipse.swt.SWT:-1:in error' org.eclipse.swt.SWT:-1:inerror'
org.eclipse.swt.SWT:-1:in error' org.eclipse.swt.custom.StyledText:-1:insetCaretOffset'
c:/dev/ruby/redcar/plugins/edit_view_swt/lib/edit_view_swt/document.rb:92:in text=' c:/dev/ruby/redcar/plugins/edit_view/lib/edit_view/document.rb:254:intext='
c:/dev/ruby/redcar/plugins/edit_view/lib/edit_view/document.rb:749:in update_from_mirror' c:/dev/ruby/redcar/plugins/edit_view/lib/edit_view.rb:606:incheck_for_updated_document'
c:/dev/ruby/redcar/plugins/edit_view/lib/edit_view.rb:278:in focussed_edit_view=' c:/dev/ruby/redcar/plugins/edit_view_swt/lib/edit_view_swt.rb:442:inswt_focus_gained'
c:/dev/ruby/redcar/plugins/edit_view_swt/lib/edit_view_swt.rb:597:in focusGained' c:/dev/ruby/redcar/plugins/edit_view_swt/lib/edit_view_swt.rb:451:infocus'
c:/dev/ruby/redcar/plugins/edit_view_swt/lib/edit_view_swt/edit_tab.rb:17:in focus' org/jruby/RubyMethod.java:133:incall'