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[Compiler Bug]: React Hook placement prevents memoization of dependent variables

facebook/react#31631·250633·JavaScript·322 天未动·0 条评论·上游最近活跃 ·池内状态:可认领
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上游 issue 正文

### What kind of issue is this? - [X] React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization) - [ ] babel-plugin-react-compiler (build issue installing or using the Babel plugin) - [ ] eslint-plugin-react-compiler (build issue installing or using the eslint plugin) - [ ] react-compiler-healthcheck (build issue installing or using the healthcheck script) ### Link to repro https://playground.react.dev/#N4Igzg9grgTgxgUxALhAHQHYIB4AcIwAuABAGZQZyECWEGxAMtWIQBQCUxwmxxcdLYgBtmJALzEoYBExYcA3Dz4CSAEwCGhdcQlSEAEU3qFmJfwyDcMCIjDTVs8cQDmCQgAVrt+49YiW7Ir0ktIAyhAAtm4AFtQYzgrEAPRJxACyEABuCMSEsWDE0RAQANbEAEYIpAQ5IljE6uVZCKbB5oIYEKoIBRIaWgB0Eeq4rKyd3ZxiAHxcSrztJP6EAJKECBE6xFY2PT6iANoTCAPUqgC6Qby8MG6w9NzB18QDr8cANPPXkFF5cc7IYSiNYbAY-GL-T5PYgAXyusMCrRudxg9FYXwAPABhSL4LAYEjHMBiYBEmHJaZKREYGGYEAwoA ### Repro steps I noticed an interesting behavior in the compiler. If you place a React hook between two variables that depend on each other, the compiler skips memoizing them. But if you move the hook somewhere else (like above both variables), the memoization works as expected. | Hook between | Hook above | | - | - | |![Screenshot 2024-11-25 at 13 40 07](https://github.com/user-attachments/assets/5e5e691d-94bf-47e5-bed9-72ccced1def8)|![Screenshot 2024-11-25 at 13 40 23](https://github.com/user-attachments/assets/e45cd841-1f46-4ec7-81f3-0c13a31b565a)| ### How often does this bug happen? Every time ### What version of React are you using? 19.0.0-rc.1 ### What version of React Compiler are you using? 19.0.0-beta-0dec889-20241115
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