FXRuby Program Crashes

require 'fox16'
include Fox
class ModelWindow < FXMainWindow
  #  The default height and width of the
main window, in pixels
  WINDOW_HEIGHT =  800
  WINDOW_WIDTH  = 1000
  WINDOW_X = 80
  WINDOW_Y = 110
  def create
    super
    show
  end  #  of method create
  def initialize(app, titleString)
    #  Create the main window
    super(app, titleString, :x    
 => WINDOW_X,

            :y      =>
WINDOW_Y,

            :width  => WINDOW_WIDTH,

            :height => WINDOW_HEIGHT)
    #  Terminate the program when the
main window is closed.  If we omit this,
    #  then closing the window results
in a return to the "main" program in
    #  WSCI_Model.rb
    self.connect(SEL_CLOSE) do
      exit(0)
    end
    #  Split the main window into two
panes, the left and right panes, and
    #  then in each pane create a frame
that allows us to create windows
    #  vertically (i.e. above one another).
    splitter = FXSplitter.new(self, :opts
=> SPLITTER_HORIZONTAL|LAYOUT_FILL)
    @left  = FXVerticalFrame.new(splitter,

                 :width  =>
WINDOW_WIDTH/2,

                 :opts =>
LAYOUT_TOP|

    LAYOUT_FIX_WIDTH|

    LAYOUT_FILL_Y|

    FRAME_SUNKEN)
    @right = FXVerticalFrame.new(splitter,

                 :opts =>
LAYOUT_TOP|LAYOUT_FILL|FRAME_SUNKEN)
    leftSplit = FXSplitter.new(@left, :opts
=> SPLITTER_VERTICAL|LAYOUT_FILL)
    leftTop = FXVerticalFrame.new(leftSplit,

                  :height
=> (WINDOW_HEIGHT*7)/10,

                  :opts =>
LAYOUT_TOP|

     LAYOUT_FIX_HEIGHT|

     LAYOUT_FILL_X|

     FRAME_SUNKEN)
    @leftBottom = FXVerticalFrame.new(leftSplit,

:opts => LAYOUT_BOTTOM|

         LAYOUT_FILL_X|

         FRAME_SUNKEN)
    #  In the top pane, create the
main text output (console) window.  We do
    #  not specify WORDWRAP - the text
is then scrollable sideways.
    $mainText = FXText.new(leftTop,

           :opts => LAYOUT_FILL|

                    TEXT_READONLY|

                    FRAME_NONE)
    #  Create the command area and
button in the lower left-hand pane
    commandGroup = FXGroupBox.new(@leftBottom,

                  "Command:",

                  :opts =>
LAYOUT_FILL_X|

     GROUPBOX_TITLE_CENTER|

     FRAME_RIDGE)
    #  Now a vertical frame
    commandVert = FXVerticalFrame.new(commandGroup,
:opts => LAYOUT_FILL_X|FRAME_NONE)
  end  #  of method initialize
end  #  of Class ModelWindow
#-------------------------------------------------------------------------------
$fxApp = FXApp.new
$ModelWindow = ModelWindow.new($fxApp, "Test")
$fxApp.create
$fxApp.run
exit(0)
ruby -w test.rb
/usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/lib/fox16/core.rb:209:
warning: mismatched indentations at 'end' with 'def' at 207
/usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/lib/fox16/core.rb:210:
warning: mismatched indentations at 'end' with 'class' at 205
<main>: [BUG] Segmentation fault
ruby 1.9.1p0 (2009-01-30 revision 21907) [x86_64-linux]
-- control frame ----------
c:0001 p:0000 s:0002 b:0002 l:000e78 d:000e78 TOP
---------------------------
-- Ruby level backtrace information-----------------------------------------
-- C level backtrace information -------------------------------------------
0x4d6491 ruby(rb_vm_bugreport+0x41) [0x4d6491]
0x500f9e ruby [0x500f9e]
0x501101 ruby(rb_bug+0xb1) [0x501101]
0x48b47f ruby [0x48b47f]
0x395b20e4c0 /lib64/libpthread.so.0 [0x395b20e4c0]
0x4909f6 ruby(st_lookup+0x26) [0x4909f6]
0x4c6815 ruby [0x4c6815]
0x4c6863 ruby(rb_get_method_body+0x23) [0x4c6863]
0x4d26ea ruby(rb_funcall+0x17a) [0x4d26ea]
0x2aaaab40ab81 /usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/ext/fox16/fox16.so(_Z18FXRbCallVoidMethodPN2FX8FXObjectEm+0x5d)
[0x2aaaab40ab81]
0x2aaaab1eceb8 /usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/ext/fox16/fox16.so(_ZN12FXRbGroupBox6recalcEv+0x40)
[0x2aaaab1eceb8]
0x2aaaabbd3e5d /usr/local/lib/libFOX-1.6.so.0(_ZN2FX8FXWindowD2Ev+0x13d)
[0x2aaaabbd3e5d]
0x2aaaab41f3c3 /usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/ext/fox16/fox16.so(_ZN2FX8FXPackerD2Ev+0x27)
[0x2aaaab41f3c3]
0x2aaaab41f5a3 /usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/ext/fox16/fox16.so(_ZN2FX15FXVerticalFrameD2Ev+0x27)
[0x2aaaab41f5a3]
0x2aaaab428e49 /usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/ext/fox16/fox16.so(_ZN17FXRbVerticalFrameD0Ev+0x39)
[0x2aaaab428e49]
0x2aaaab4a4dac /usr/local/lib/ruby/gems/1.9.1/gems/fxruby-1.6.19/ext/fox16/fox16.so(_ZN10FXRbObject8freefuncEPN2FX8FXObjectE+0xf4)
[0x2aaaab4a4dac]
0x41b777 ruby [0x41b777]
0x41b8ff ruby [0x41b8ff]
0x41bac4 ruby(rb_gc_call_finalizer_at_exit+0x174)
[0x41bac4]
0x417c07 ruby(ruby_cleanup+0x147) [0x417c07]
0x417d5a ruby(ruby_run_node+0x3a) [0x417d5a]
0x4154cd ruby(main+0x4d) [0x4154cd]
0x395a61d974 /lib64/libc.so.6(__libc_start_main+0xf4)
[0x395a61d974]
0x4153c9 ruby [0x4153c9]
[NOTE]
You may encounter a bug of Ruby interpreter. Bug reports
are welcome.
For details: http://www.ruby-lang.org/bugreport.html
Aborted
[toll@localhost Emu_Test]$