Correct me if I am wrong, but the way I read SRFI 125, there is no guarantee than a given implementation of SRFI 125 will not choke on, say,(make-hash-table eq-comparator 'weak-keys).
Correct me if I am wrong, but the way I read SRFI 125, there is no guarantee than a given implementation of SRFI 125 will not choke on, say,