From: Minero Aoki <aamine@...>
Date: 2003-10-09T06:42:06+09:00
Subject: [ruby-dev:21555] marshal_dump & IO

青木です。

以下のように、シリアライズ不可能なオブジェクトを marshal_dump で
返すと、(ダンプ時ではなく) ロード時にエラーになります。

  class C
    def marshal_dump
      STDIN
    end
    def marshal_load( data )
    end
  end
  Marshal.load(Marshal.dump(C.new))

  % ruby ~/tmp/marshal_c
  marshal_c:8:in `load': marshal data too short (ArgumentError)
	  from marshal_c:8

こうでしょうか。
-------------------------------------------------------------------
青木峰郎

Index: marshal.c
===================================================================
RCS file: /src/ruby/marshal.c,v
retrieving revision 1.103
diff -u -p -r1.103 marshal.c
--- marshal.c	6 Oct 2003 07:23:40 -0000	1.103
+++ marshal.c	7 Oct 2003 05:45:05 -0000
@@ -492,7 +492,7 @@ w_object(obj, arg, limit, weak)
 	    v = rb_funcall(obj, s_mdump, 0, 0);
 	    w_byte(TYPE_USRMARSHAL, arg);
 	    w_unique(rb_class2name(CLASS_OF(obj)), arg);
-	    w_object(v, arg, limit, Qtrue);
+	    w_object(v, arg, limit, Qfalse);
 	    c_arg.weak = Qtrue;
 	    if (ivtbl) w_ivar(ivtbl, &c_arg);
 	    return;