defmethod doesn't call add-method

[rschlatte]

Reported by Pascal Costanza:

There is a problem that a defmethod may not call add-method as it should. Here is a transcript:

CL-USER(1): (use-package :mop)
T
CL-USER(2): (defclass my-generic-function (standard-generic-function) () (:metaclass funcallable-standard-class))
#<FUNCALLABLE-STANDARD-CLASS MY-GENERIC-FUNCTION {3606AFA2}>
CL-USER(3): (defgeneric f (x) (:generic-function-class my-generic-function))
#<MY-GENERIC-FUNCTION F {589D4D84}>
CL-USER(4): (defmethod add-method :after ((gf my-generic-function) (m standard-method)) (print :foo))
#<STANDARD-METHOD ADD-METHOD :AFTER (MY-GENERIC-FUNCTION STANDARD-METHOD) {3F4C428F}>
CL-USER(5): (defmethod f ((x integer)) (+ x x))
#<STANDARD-METHOD F (INTEGER) {27A5DAC0}>
CL-USER(6): (add-method #'f *)

:FOO 
#<MY-GENERIC-FUNCTION F {589D4D84}>
CL-USER(7): (f 5)
10

…or maybe just :after methods on add-method are not called…

[rschlatte]

(In [14289]) Don't shortcut add-method for subclasses of standard-generic-function

• Fixes #276

• Reported by Pascal Costanza

[Mark Evenson]

(In [14290]) abcl-1.1.x: Backport r14289.

Don't shortcut add-method for subclasses of standard-generic-function

• Fixes #276

• Reported by Pascal Costanza