tmm1	2013-12-06 14:32:11 +0900 (Fri, 06 Dec 2013)

  New Revision: 44028

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=44028

  Log:
    gc.c: add note about experimental nature of new GC.start flags

  Modified files:
    trunk/gc.c
Index: gc.c
===================================================================
--- gc.c	(revision 44027)
+++ gc.c	(revision 44028)
@@ -5002,6 +5002,10 @@ Init_stack(volatile VALUE *addr) https://github.com/ruby/ruby/blob/trunk/gc.c#L5002
  *
  *  Use full_mark: false to perform a minor GC.
  *  Use immediate_sweep: false to defer sweeping (use lazy sweep).
+ *
+ *  Note: These keyword arguments are implementation and version dependent. They
+ *  are not guaranteed to be future-compatible, and may be ignored if the
+ *  underlying implementation does not support them.
  */
 
 static VALUE

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