Backport #8005: Methods made private/protected after definition are made uncallable by prepend

• Status: Closed
• Assignee: nagachika (Tomoyuki Chikanaga)

[skwosh (Alex Goldsmith)]

Prepending a module seems to break method resolution for methods that have been made private or protected via the def private *names and def protected *names methods.

---

class A
end

A.send :prepend, Module.new {} # Works if this line is removed...

class A
def foo() end
protected :foo # Also works if we use the argument-less form of "protected"...
end

A.new.respond_to? :foo, true # => true

A.new.send :foo # => NoMethodError: undefined method `foo' for #<A:...>

---

Note that it correctly reports that it can respond_to?...

This breaks in Rails 4 when trying to prepend to an ActiveRecord::Base (due to dynamically defined model callbacks).

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r39743.
Alex, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

vm_method.c: overrid flag of prepending method

• vm_method.c (rb_export_method): directly override the flag of method
  defined in prepending class too, not adding zsuper entry.
  [ruby-core:53106] [Bug #8005]

[nobu (Nobuyoshi Nakada)]

• Tracker changed from Bug to Backport
• Project changed from Ruby master to Backport200
• Status changed from Closed to Assigned
• Assignee set to nagachika (Tomoyuki Chikanaga)

[nagachika (Tomoyuki Chikanaga)]

• Status changed from Assigned to Closed

This issue was solved with changeset r40252.
Alex, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

merge revision(s) 39742,39743: [Backport #8005]

assertions.rb: private flag

* lib/test/unit/assertions.rb (assert_respond_to): accept optional

include-private flag.
* vm_method.c (rb_export_method): directly override the flag of method
defined in prepending class too, not adding zsuper entry.
[ruby-core:53106] [Bug #8005]