Cannot subclass Curl::Easy

[Andrew Otto]

I cannot create a subclass of Curl::Easy. I've tried several
variations of this, but every attempt fails. All of my subclass are
of type Curl::Easy, and do not contain any of the new methods I
define. Here's a really simple example:

class MyCurl < Curl::Easy
end

c = MyCurl.new # => #<Curl::Easy:0x56d768>
c.class # => Curl::Easy
c.kind_of?(MyCurl) # => false

Am I doing something wrong here, or is this a bug?

Thanks!
-Andrew