# File ruby/jbridge.rb, line 1043
        def cancel_all_finalizer
          @@object_lock.synchronize {
                print_debug "      ----GC: begin cancelling finalizer: #{@@object_id_table.size}"
                @@object_id_table.reject! {|key,value|
                  begin
                        obj = ObjectSpace._id2ref(key)
                        ObjectSpace.undefine_finalizer(obj)
                        print_debug "      ----GC:   cancel: #{obj.__object_id}"
                  rescue RangeError => e
                  end
                  true
                }
          }
        end