Issue #9112 has been updated by Nobuyoshi Nakada.


No.
`Module#include` doesn't change superclass of the receiver's metaclass.

----------------------------------------
Feature #9112: Make module lookup more dynamic (Including modules into a module after it has already been included)
https://bugs.ruby-lang.org/issues/9112#change-49279

* Author: Tobias Pfeiffer
* Status: Assigned
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Category: core
* Target version: 
----------------------------------------
If a module (M) is included into a class (C) and afterwards another module (M2) is included into the first module (M) then C does not include M2 and instances do not respond to methods defined in M2. I think instances of C should respond to methods defined in M2 and C should include M2.

I created a gist detailing the problem I have: https://gist.github.com/PragTob/7472643

I think this behavior is confusing, because if I'd reopen module M and just add methods there then instances of C can call those methods. However if I include another module in M then instances of C can not call those methods.

Any opinions on if this would be a better behavior or why it isn't?

(was unsure to file it as a bug or feature)



-- 
https://bugs.ruby-lang.org/