From: kachick1@...
Date: 2021-03-20T19:06:18+00:00
Subject: [ruby-core:102963] [Ruby master Bug#17739] Array#sort! changes the order even if the receiver raises FrozenError in given block

Issue #17739 has been reported by kachick (Kenichi Kamiya).

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Bug #17739: Array#sort! changes the order even if the receiver raises FrozenError in given block
https://bugs.ruby-lang.org/issues/17739

* Author: kachick (Kenichi Kamiya)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-darwin20]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
I think this is a similar issue of https://bugs.ruby-lang.org/issues/17736

```ruby
array = [1, 2, 3, 4, 5]
begin
  array.sort! do |a, b|
    array.freeze if a == 3
    1
  end
rescue => err
  p err #=> #<FrozenError: can't modify frozen Array: [5, 4, 3, 2, 1]>
end
p array #=> [5, 4, 3, 2, 1]

array = [1, 2, 3, 4, 5]
array.sort! do |a, b|
  break if a == 3
  1
end
p array #=> [3, 4, 2, 1, 5]
```

Array#sort! raises a FrozenError as expected, but the order is changed. I would expect the order is kept after frozen. 



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