// (this.global === this) -> global aliases the global object.
} else if (isThis(rhs) && lhs instanceof Reference) {
addFactInt(lhs, Fact.GLOBAL);
} else {
String typeOf = rhs.typeOf();
if (typeOf != null && lhs.typeOf() == null) {
addFactInt(
Operation.create(UNK, Operator.TYPEOF, lhs),
Fact.is(StringLiteral.valueOf(UNK, typeOf)));
}