// b.sx authors its OWN `apply` taking a POINTER. `from_b` passes a value local
// `v` bare; the pointer param must drive implicit address-of so the callee
// mutates `v` in place (×2 → 42). Before the fix, `v` was typed against a.sx's
// value-param winner, lowered as a value, then the resolved pointer-param
// author was called with that value forced to a pointer (segfault).
apply  :: (x: *s64) { x.* = x.* * 2; }
from_b :: () -> s64 { v : s64 = 21; apply(v); return v; }