# File lib/ruby-debug-base.rb, line 147
    def handle_post_mortem(exp)
      return if !exp || !exp.__debug_context || 
        exp.__debug_context.stack_size == 0
      Debugger.suspend
      orig_tracing = Debugger.tracing, Debugger.current_context.tracing
      Debugger.tracing = Debugger.current_context.tracing = false
      Debugger.last_exception = exp
      handler.at_line(exp.__debug_context, exp.__debug_file, exp.__debug_line)
    ensure
      Debugger.tracing, Debugger.current_context.tracing = orig_tracing
      Debugger.resume
    end