Client: IsOptsWithPrefix returns false even if WithPrefix() is included

[mdelissen]

What happened?

If you use the function IsOptsWithPrefix with opts containing WithPrefix() it always returns false instead of true.

What did you expect to happen?

IsOptsWithPrefix should return true if opts contains WithPrefix()

How can we reproduce it (as minimally and precisely as possible)?

package main

import (
  "log"
  etcd "go.etcd.io/etcd/client/v3"
)

func main() {
  log.Printf("%v", etcd.IsOptsWithPrefix([]etcd.OpOption{etcd.WithPrefix()}))
}

Logs false instead of true

Anything else we need to know?

IsOptsWithPrefix creates an empty op with NewOp which sets a key with len 0. Therefore the len check in WithPrefix also is true and the flag is not set.

Etcd version (please run commands below)

Not related to etcd backend, only client. Tested versions: v3.5.4, v3.6.0-alpha.0

Etcd configuration (command line flags or environment variables)

No response

Etcd debug information (please run commands blow, feel free to obfuscate the IP address or FQDN in the output)

No response

Relevant log output

No response

[spzala]

I could reproduce it. Working on fix.