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While debugging #30536 I happened to notice that the bug only reproduced
when there was interleaving scopes, and observed that an unpruned scope
nested inside of a pruned one was not being visited by
CollectPromotableTemporaries, which keeps track of which identifiers
should be promoted later. Therefore when actually promoting temporaries
we were skipping over the identifiers in children of pruned scopes
ghstack-source-id: d805f62f22
Pull Request resolved: https://github.com/facebook/react/pull/30537
babel-plugin-react-compiler
React Compiler is a compiler that optimizes React applications, ensuring that only the minimal parts of components and hooks will re-render when state changes. The compiler also validates that components and hooks follow the Rules of React.
This package contains the React Compiler Babel plugin use in projects that make use of Babel. You can find instructions for using this plugin here: https://react.dev/learn/react-compiler