execute (Debugger::VarInheritCommand)

    # File cli/ruby-debug/commands/variables.rb, line 172
        def execute
          unless @state.context
            errmsg "can't get object inheritance.\n"
            return
          end
          puts @match.post_match
          obj = debug_eval("#{@match.post_match}.classtree")
          if obj
            print obj
          else
            errmsg "Trouble getting object #{@match.post_match}\n"
          end
        end