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[Compiler Bug]: Moved breakpoint in React Native

facebook/react#31651·250633·JavaScript·322 天未动·2 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? - [ ] React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization) - [x] 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://github.com/maciekstosio/CompilerRepo ### Repro steps - Run the app ``` yarn install yarn start ``` - Run dev tools - Try to put breakpoint on `const a = 'Test Error';` - it's moved to main component - Put breakpoint on `throw new Error(a);` - debugger don't stop on The debugger used with React Native (0.76.3) sometimes moves the breakpoint to other places. It sometimes doesn't stop. I can reproduce it reliably with the variable assignment and arrow functions. The problem occurs both in DevTools and Radon IDE ), so I assume this is a problem with source maps after optimization or Chrome Debugger, not the DevTools front. |Without Compiler|With Compiler| |-|-| |<video src="https://github.com/user-attachments/assets/bcb514cc-4697-4019-998f-79ca2fb1c219" />|<video src="https://github.com/user-attachments/assets/c1dbb46d-5da2-49d8-a1d3-1f4545729fe4" />| ### How often does this bug happen? Every time ### What version of React are you using? 18.3.1 ### What version of React Compiler are you using? 19.0.0-beta-df7b47d-20241124
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