nobu	2008-04-18 17:37:50 +0900 (Fri, 18 Apr 2008)

  New Revision: 16072

  Modified files:
    trunk/ChangeLog
    trunk/gc.c

  Log:
    * gc.c (rb_gc_mark_locations): get rid of underflow.
    
    * gc.c (mark_current_machine_context): check if the main thread stack
      position may shink under the intialized position.  [ruby-core:16436]


  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=16072&r2=16071&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/gc.c?r1=16072&r2=16071&diff_format=u