Error with GET key

[jerrojelly]

What does it mean to add CRLF? append \n\r still crash RedCat

try cat.updateValue(["Joannis", "Orlandos", 20], forKey: "qwe:123")
print("\(try cat.listKeys("qwe*"))")
print("\(try cat.get("qwe*"))")  <--- Error CRLF
print("\(try cat.get("qwe:123"))")  <--- No error, return the array result

fatal error: Error raised at top level: DRIVER String length not terminated with CRLF: file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-800.0.63/src/swift/stdlib/public/core/ErrorType.swift, line 184

[jerrojelly]

The output for nonexistent key with GET in redis-cli is (nil) Null Bulk String, it is a valid scenario to display as empty or "notfound" instead of error?

127.0.0.1:6379> GET qwe*
(nil)

This is called a Null Bulk String. The client library API should not return an empty string, but a nil object, when the server replies with a Null Bulk String. For example a Ruby library should return 'nil' while a C library should return NULL (or set a special flag in the reply object), and so forth.
https://redis.io/topics/protocol