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From: "Ethan (Ethan -) via ruby-core"
Date: 2025-05-27T05:30:21+00:00
Subject: [ruby-core:122303] [Ruby Bug#21375] Set[] does not call #initialize
Issue #21375 has been reported by Ethan (Ethan -).
----------------------------------------
Bug #21375: Set[] does not call #initialize
https://bugs.ruby-lang.org/issues/21375
* Author: Ethan (Ethan -)
* Status: Open
* ruby -v: ruby 3.5.0dev (2025-05-26T17:42:35Z master 909a0daab6) +PRISM [x86_64-darwin22]
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
I have a subclass of Set that overrides #initialize. Following #21216, .new does call #initialize but .[] does not.
```ruby
class MySet < Set
def initialize(enum = nil)
compare_by_identity
super
end
end
MySet.new.compare_by_identity?
# => true
MySet[].compare_by_identity?
# => false
```
--
https://bugs.ruby-lang.org/
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