original.name="UnionType_Invalid_12"
======
>>> main.whiley
public export method test():
    (&int)|(&bool) x = new 1
    *x = false
    (&int)|(&bool) y = ((&int)|(&bool)) new 1
    *y = false
---
E400 main.whiley 3,9:13
E404 main.whiley 5,5