(:from-end t) (:end sequence-end) (:key callable))
sequence
(unsafely-flushable call important-result)
:derive-type (sequence-result-nth-arg 1)
:destroyed-constant-args (nth-constant-nonempty-sequence-args 1))
(:from-end t) (:end sequence-end) (:key callable))
sequence
(unsafely-flushable call important-result)
:derive-type (sequence-result-nth-arg 1)
:destroyed-constant-args (nth-constant-nonempty-sequence-args 1))