naruse	2009-11-04 22:42:03 +0900 (Wed, 04 Nov 2009)

  New Revision: 25650

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=25650

  Log:
    Add rdoc about objects can't Marshal#dump.  [ruby-core:23314]

  Modified files:
    trunk/marshal.c

Index: marshal.c
===================================================================
--- marshal.c	(revision 25649)
+++ marshal.c	(revision 25650)
@@ -890,6 +890,12 @@
  *     data = Marshal.dump(o)
  *     obj = Marshal.load(data)
  *     obj.sayHello   #=> "hello\n"
+ *
+ * Marshal can't dump following objects:
+ * * anonymous Class/Module.
+ * * objects which related to its system (ex: Dir, File::Stat, IO, File, Socket and so on)
+ * * an instance of MatchData, Data, Method, UnboundMethod, Proc, Thread, ThreadGroup, Continuation
+ * * objects which defines singleton methods
  */
 static VALUE
 marshal_dump(int argc, VALUE *argv)

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