merge revision(s) 55429: [Backport #12492]

	* class.c (Init_class_hierarchy): prevent rb_cObject which is the
	  class tree root, from GC.  [ruby-dev:49666] [Bug #12492]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@59215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/class.c b/class.c
index 31b83137d4..cb69ffe2b3 100644
--- a/class.c
+++ b/class.c
@@ -549,6 +549,7 @@ Init_class_hierarchy(void)
 {
     rb_cBasicObject = boot_defclass("BasicObject", 0);
     rb_cObject = boot_defclass("Object", rb_cBasicObject);
+    rb_gc_register_mark_object(rb_cObject);
     rb_cModule = boot_defclass("Module", rb_cObject);
     rb_cClass =  boot_defclass("Class",  rb_cModule);