Bug #17512: ostruct super regression

• Status: Closed
• Assignee: marcandre (Marc-Andre Lafortune)
• Target version: -
• ruby -v: 3.0.0
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN

[HParker (Adam Hess)]

In ruby 3.0, Calling super on ostruct always returns nil. This is a regression in ruby 3.0 introduced when fixing another issue.

introduced by:

• https://bugs.ruby-lang.org/issues/12136
• https://github.com/ruby/ruby/commit/e026e186f4a01aa3f6cd02ae6ef33f44f129361c

This unintentionally changed super behavior in classes that inherit from OpenStruct.

require 'ostruct'

class Foo < OpenStruct
  def foo
    super
  end
end

p Foo.new(foo: 123).foo

Ruby 3.0:
=> nil
Ruby 2.7:
=> 123

Potential fix is to bring back some of the behavior reverted in issue #12136 to allow method missing to sometimes respond to methods with zero arguments.

This is implemented in: https://github.com/ruby/ruby/pull/4028 and included as a patch attached to this issue.

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Assigned
• Assignee set to marcandre (Marc-Andre Lafortune)

[marcandre (Marc-Andre Lafortune)]

• Status changed from Assigned to Closed

Fixed and released as 0.3.2, thanks!