-- expect-rc: -64
-- 展示 check()／fail() 與失敗時的結束摘要（本範例刻意示範失敗）。
check(1 + 1 == 2, "1 + 1 == 2")
check(1 + 1 == 3, "deliberately wrong: 1 + 1 == 3")
log("info", "check_pass_fail done")