Segfault on toggle callback with GtkCheckButton

Hi All,

I'm new to PHP-GTK, but I've got a fairly strong background using gtk and C.  I've been attempting to set up a callback function that is called whenever a GtkCheckButton is toggled, but I'm getting a segfault every time.  I've reproduced the crash in the below code.

This is running on Ubuntu 7.10/Gutsy using the Ubuntu 5.2.3 php5-cli executable.

Any ideas?  xdebug isn't giving me any stacktrace on the segfault, so I assume that means the php executable itself is crashing.

Thanks,

-- Alex Augot

/////////////////////////// 
Code
///////////////////////////
<?php
// Toggle Button Crash Test

class testClass
{
   private $gtkButton;

   public function createButton()
   {
      $this->gtkButton = new GtkCheckButton("My Label");
      $this->gtkButton->connect_simple('toggled', array($this, 'selectedEvent'));
   }

   public function getButton() { return $this->gtkButton; }
   
   public function selectedEvent()
   {
     if($this->gtkButton->get_active())
        $this->gtkButton->set_active(false);
     else
        $this->gtkButton->set_active(true);
   }
}

// Create the test button
$testButton = new testClass();
$testButton->createButton();

// Create a test window, hbox, and add 
// the button to it.  When button is toggled, it segfaults
$gtkWindow = new GtkWindow();
$gtkBox    = new GtkHBox();

$gtkWindow->add($gtkBox);
$gtkBox->add($testButton->getButton());

$gtkWindow->set_visible(true);

Gtk::main();
?>