Bug #15255: Change in protected handling 2.3 -> 2.4,2.5

• Status: Rejected
• Assignee: -
• Target version: -
• Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN

[viraptor (Stan Pitucha)]

It looks like when moving to 2.4 and higher, the access to protected method has changed. In the following case:

class Foo
  def bar(objects)
    objects.map(&:baz)
  end

  protected

  def baz
    self.inspect
  end
end

a = Foo.new; b = Foo.new

a.bar([b])

The protected method '...' called will be raised. I haven't seen any explicit mention of this in the release notes.
It can be rewritten to successfully run as:

objects.map { |x| x.baz }

But it was an unexpected change. (so potentially a bug?)

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Rejected

Testing Ruby versions from 1.9 to 2.7, only Ruby 2.3 does not raise a NoMethodError for the example code. I think that can be considered a bug in Ruby 2.3. As Ruby 2.3 is no longer supported, the bug will not be fixed.