[Compiler Bug]: 'Unused 'use no memo' directive' lint warning even though the directive is used

[jthemphill]

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/#N4Igzg9grgTgxgUxALhAegFQYDoDsAEG+AKgBYCWY+l+Y5AtuQDYCGM+ALhPlGAgMocWHBABp8AIygdqMlkyYQA7lQDmCDh3K5VnUgnysRYGSeEGEANwS48hSQgBmEGAY77aQkflIsqEhBseAAcAE3NQyQBPfFcWOA4AOjsMNDwEAA9glxlHKFwE8ggCXgEogsFzAAptci15AEp8YDt8AHJS-FxuegR6CDbWuGKTfABtcT4OADV5KAQAXXwAXh4+SpEa3DryRoBuIZGZV0cVtYQAJSctnf3W1w5YAjHW-HwqpuWAPlinRLhYK5cBxRK93pY5ghPj8WgQ3vDyKcqid-oCbDIAITLVYQpjzJqw+FE36OVEwIEyHGQg5w4m0DSzPEIKq4-E0ukAXzBHNBcIWNK5tlwmBwBCIAEEfBAIABrTjcGWBYKcGDxOUQU7uCyhOosCRMAxmbwavQGbTBaTJMX4AByEG87mE+CUBlwgUiXB8LFwoQN+BY+GGUGCfpNCFC6kDfgQYGQKXwAEZEoGIPRGDJ6CwYgEowpw9QCFraCxer8fQh2IoIMq-CFwiIAKI6maQ+MAJmTwfrCCbdUZ83wmezBjg8gNkRYjhE7GGabq1Coo7zoXjZBjBjYBlCA89Rcc8RkjpkNqg9ACMAAkrgLTJpMxyAAvGOyKjKAhGhAAWgk0ZX1tZBhduYVDepEs7pgW+AuKEFbyvgwQVs4MD0Cm5IIAk+BIZmmjaKoVqEGkbpZDkmH5IUxTnL2Qj6syhJQbgADCvg6GIrTFAAQniMC8m8cShAA8rgTAxKs+5MHwPH4ABknFEx3rqFeN79qxcKyd6iBMJJMH7lATAcFRuFnGJEl4ByBKtB0fBdD0fQDIcuCjGM6gtky7EILhVHhpMDKQm5HnNuGSyrKU-DlHAGzMmC2ksLp+nNoZAD8zRSZC+AcvgyBdLpmmtA0NL2aM4HzqsHwrDCYLDA5MgAX5OieZEqzOcptWqPVHzsgiSI1e5dUBZEWKrLg2X4AAZCNKWuT1rV9YkAH4ANE34s0YJvLJzHqAliQsr5U31bNkJ5dyYJTM1u19VUQ0KIdtL0ZxsCbe1rQcvlcKVYV6kIEwZyld8y03SdO3+XU4YXdl11Emt8kIIp0jKQ9AHg-CakFJ9D2I6tuB3TAaMdc9eAFTI6IVlREXfdCf1Eoi7wYnxgnCeZN1vADk1AyIoRVMAi0GGZHVvIKfMvW8b23mE5hUcp31ukoynk3RGNySxMMufMD1SzLvMplVXMtfVZxNYDvXA+z6PUF1BvTUbo3jd1rPhvtTLzdiXQINLB0U8SzPzDr52cwBmVq6lPPcvgn1WXL8JoGgJAUFQNCOOQrgTlOsFFSCtDcPOYCkNATCRKo3AmKq5CqKQh7cJDLErfgkf4AA6huYBgKebi+DI85KMwX1utY7A5vHicOEhFjAsTzYReI2cuj3+HEhXG1bQHTIm-zaWC5row24bbN6z5LNbyDiMPE87tvH72tnZbSWbxbbP2wOmXSWClAGToD-m7rC2XV9Y3zbTQlRJJIWqZ0yAKjCjHKN0iYwBJl4FSRIgKNmbMpSSgpBQgA5EAA

Repro steps

useSyncState and useEditable break when the React Compiler runs on it. So I added 'use no memo' to the top of useSyncState and useEditable. In both these places, eslint-plugin-react-compiler reports that the 'use no memo' directive is unused. Even though this directive is the only difference between a passing E2E test and a failing one!

• Related to [Compiler Bug]: Compiler doesn't catch ref access in render #31406, where I report that the compiler should ideally bail out on these hooks so the 'use no memo' directive becomes unnecessary.

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-6fc168f-20241025