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rails--rails/activesupport/CHANGELOG.md
Jean Boussier 68e9df0257 Ruby 3.1: Handle Class#subclasses existing without Class#descendants 
Since `#subclasses` was introduced a bit after `#descendants`, the feature testing
code assumed that if the former was present, the later would be too.

However it was decided to revert `#descendants` for now, but to keep `#subclasses`
https://bugs.ruby-lang.org/issues/14394#note-33

Since this was totally unexpected, the `#descendants` core_ext and `DescendantsTracker#descendants`
are broken on Active Support 7.0.0 / Ruby 3.1.0-dev.

We now test the existence of both methods to handle this new situation. Since
for now it's planned for `#descendants` to make it back in Ruby 3.2, we keep
checking for it.
2021-12-21 11:41:56 +01:00

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Please check 7-0-stable for previous changes.