original.name="StaticVar_Invalid_13"
js.compile.ignore=true
======
>>> main.whiley
int var = -1

method inc()
requires var >= 0
ensures old(var) < var:
    var = var + 1

public export method test():
    inc()
---
E700 main.whiley 9,4:8
E716 main.whiley 9,4:8
=====
>>> main.whiley 1:2
type nat is (int x) where x >= 0
nat var = 1
---