use `length` returned from push
use `length` returned from push

tildeio/glimmer,glimmerjs/glimmer-vm,lbdm44/glimmer-vm,glimmerjs/glimmer-vm,glimmerjs/glimmer-vm,lbdm44/glimmer-vm,tildeio/glimmer,tildeio/glimmer,lbdm44/glimmer-vm