Some code breaks in strict mode

[chunkybanana]

Specifically, Line 156 as it assigns length which is meant to be immutable. I'm not sure how to fix this.

[Radvylf]

I haven't the slightest clue what that does but it looks a bit cursed. I'd try to fix it but it looks like the sort of thing that, once touched, would start a snowball of weird errors going that ends up enveloping the earth.