19c19,23
<     ;; TODO: grow by 1 page, fill first 10 bytes with 42, return new size
---
>     ;; grow by 1 page, compute new size (prev + 1)
>     (i32.add (memory.grow (i32.const 1)) (i32.const 1))
>
>     ;; fill first 10 bytes with 42
>     (memory.fill (i32.const 0) (i32.const 42) (i32.const 10))