我正在尝试使用数值库中的readBin函数，但ghci告诉我它不在范围内。readOct和readHex等其他函数正在工作。这里会有什么问题呢？
以下是错误消息：

Prelude> import Numeric
Prelude Numeric> :t readBin

<interactive>:1:1: error:
    • Variable not in scope: readBin
    • Perhaps you meant ‘readLn’ (imported from Prelude)
Prelude Numeric> :t readHex
readHex :: (Eq a, Num a) => ReadS a
Prelude Numeric> readHex "deadbeef"
[(3735928559,"")]

字符串