adobe, flex4, the whole Eclipse environment freezes with CPU at 99%

environment: adobe flex4 AS3.0 Eclipse ide

problem: the whole Eclipse environment freezes with CPU at 99% and never becomes normal


solution: 
it IDE's bug, if you have remarked text in the are of arguments of a function... move them somewhere else
i.e.
  public function newItem(
   /**HELP, creates a new item */
   name:String
  ){
    ....
  }

the red text indicates the wrong remarked text