ngx_rbt_copy_color  225 core/ngx_rbtree.c         ngx_rbt_copy_color(subst, node);
ngx_rbt_copy_color  283 core/ngx_rbtree.c                 ngx_rbt_copy_color(w, temp->parent);
ngx_rbt_copy_color  312 core/ngx_rbtree.c                 ngx_rbt_copy_color(w, temp->parent);