[Compiler Bug]: don't uses dependecies of useMemo

[Altro31]

What kind of issue is this?

• 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/#N4Igzg9grgTgxgUxALhASwLYAcIwC4AEwUYCAsghhAL4EBmMEGBA5DAgIZx4sA6AdgIQAPHPnpR+3NBH4EyATwCCWLAApgBdvwAmCGAWoBKIgIEECcWWEL8OGBGAIBeAiXKUIatSecA+AgADJQAbPEYCABJgMg48AAsAOhgOXSYfakCAGgBtbT0YAF0jMzktBDxYOQAeAGEmLCUCOwcwZ2AWx2oAej8BalKhUVxCOklpWQJ67CUNZvsEQxNgUosrfhsJEJDOlyDoztoAJQgdGABbgHMoBAAvQNXyypganTQANz8ACQRtiAIAOq4EI6IhjbaHardN6fADc-RA1CAA

Repro steps

1. Look at useMemo.
2. Dependecies are not used in compilation

How often does this bug happen?

Every time

What version of React are you using?

playground

[josephsavona]

Thanks for posting. This is expected behavior: the code in this example does not need to be memoized - it’s a template string which can be cheaply compared for equality later - so the compiler removes the unnecessary useMemo.