Decorators are lost when module is mounted

[enikesha]

Decorators defined on define-route are lost when this module is mounted as sub-module into other module.

My simplified situation is like this:

packages.lisp

(restas:define-module #:test
  (:use #:cl))

(restas:define-module #:test.admin
  (:use #:cl))

admin.lisp

(in-package #:test.admin)

(defclass login-required-route (routes:proxy-route) ())
(defmethod restas:process-route ((route login-required-route) bindings)
  (break)) ;; Not breaking
(defun @login-required (route)
  (make-instance 'login-required-route :target route))

(restas:define-route admin-index ("")
  (:decorators '@login-required)
  "In admin")

test.lisp

(in-package #:test)

(restas:mount-module admin (#:test.admin)
  (:url "admin"))

Going to /admin/ is not actually breaking in this case.