class DEBUGGER__::CatchBreakpoint

def setup
  @tp = TracePoint.new(:raise){|tp|
    exc = tp.raised_exception
    next if SystemExit === exc
    next if skip_path?(tp.path)
    next if !safe_eval(tp.binding, @cond) if @cond
    should_suspend = false
    exc.class.ancestors.each{|cls|
      if @pat === cls.name
        should_suspend = true
        @last_exc = exc
        break
      end
    }
    suspend if should_suspend
  }
end