Bug #11867: overriden constant instance variable mismatch

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[dingoegret (dingo egret)]

A = Struct.new(:a)

A.new(1)
#<struct A a=1>

class A
  def initialize(b)
    @b = b
  end
end

A.new(1)
#<struct A a=nil>

Is this expected?

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Feedback

Exactly.

What do you expect instead?

[shugo (Shugo Maeda)]

dingo egret wrote:

class A
  def initialize(b)
    @b = b
  end
end

You should call super if you want to set the member a.

class A
  def initialize(b)
    super(b)
    @b = b
  end
end

[dingoegret (dingo egret)]

Nobuyoshi Nakada wrote:

Exactly.

What do you expect instead?

I expected the latest constant to set its @b property. If not Class A, at the very least I expected Struct :a to get set. Is this not the intuitive thing to expect? People send arguments based on param ordering in constant definition. This is totally bypassing that expectation.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Feedback to Closed