Differentiate T_OBJECT shapes from other objects

We would like to differentiate types of objects via their shape.  This
commit adds a special T_OBJECT shape when we allocate an instance of
T_OBJECT.  This allows us to avoid testing whether an object is an
instance of a T_OBJECT or not, we can just check the shape.

1 files changed, 1 insertions, 1 deletions

diff --git a/object.c b/object.c
index 7f4404c462..e50430a4fb 100644
--- a/object.c
+++ b/object.c
@@ -293,7 +293,7 @@ rb_obj_copy_ivar(VALUE dest, VALUE obj)
     rb_shape_t * initial_shape = rb_shape_get_shape(dest);
 
     if (initial_shape->size_pool_index != src_shape->size_pool_index) {
-        RUBY_ASSERT(initial_shape->parent_id == ROOT_SHAPE_ID || initial_shape->type == SHAPE_ROOT);
+        RUBY_ASSERT(initial_shape->type == SHAPE_T_OBJECT);
 
         shape_to_set_on_dest = rb_shape_rebuild_shape(initial_shape, src_shape);
     }