text: // Allow diamonds in the graph of the compartment "debugs" relation.
  var program = newGlobal('new-compartment');
  var d1 = newGlobal('new-compartment');
  d1.top = this;
  var d2 = newGlobal('new-compartment');
  d2.top = this;
  var dbg = new Debugger(d1, d2);
  d1.eval("var dbg = new Debugger(top.program)");
  d2.eval("var dbg = new Debugger(top.program)");
  
  // mess with the edges a little bit -- all this should be fine, no cycles
  d1.dbg.removeDebuggee(program);
  d1.dbg.addDebuggee(program);
  dbg.addDebuggee(program);
  d1.dbg.addDebuggee(d2);
  dbg.removeDebuggee(d2);
  dbg.addDebuggee(d2);
  
  