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[Compiler Bug]: constant gets memoized with a wrong dependency
77
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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-hooks (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/#N4Igzg9grgTgxgUxALhAMygOzgFwJYSYAEAIgIY4IDCEAtgA6EKY4AUwRAJhQkQL4BKIsAA6xInEJgcRNBBi0KlGEQC8RTAgDuRAJIsANgDpylACp5aCAGLzFbAOTMAtAFUAyg4EBuMWKJEMAg4sMSs-gFEADz4Vlw8sQiqwNyURjgQuu4A8u44MHiYAOasAnwAfBGRwnIKSggwRrX2rKkIZVXRAPSJleI+YnwgADQgkphoeEUoIJaMMDI4AJ70vBwACgZQRYXZ9PhS-LIwdEQOAEZk5wgGzvRbO5jOQWS4zpIMeAYNXZx40g5fJgxOwIl0uh96F8KARMABZCCcBDIIgiEBkAwGNGDIhgGFgSYIMBETbbXb7WFgHwjcAACwgWn0ykwGLAKDQrIQfCAA
### Repro steps
Given this example:
```tsx
function DateComponent({ date }) {
const formatter = new Intl.DateTimeFormat('en-US');
return (
<time datetime={date.toISOString()}>
{formatter.format(date)}
</time>
);
}
```
gets compiled to:
```typescript
import { c as _c } from "react/compiler-runtime";
function DateComponent(t0) {
const $ = _c(6);
const { date } = t0;
let t1;
let t2;
if ($[0] !== date) {
const formatter = new Intl.DateTimeFormat("en-US");
t1 = date.toISOString();
t2 = formatter.format(date);
$[0] = date;
$[1] = t1;
$[2] = t2;
} else {
t1 = $[1];
t2 = $[2];
}
let t3;
if ($[3] !== t1 || $[4] !== t2) {
t3 = <time datetime={t1}>{t2}</time>;
$[3] = t1;
$[4] = t2;
$[5] = t3;
} else {
t3 = $[5];
}
return t3;
}
```
`const formatter = new Intl.DateTimeFormat("en-US");` incorrectly gets `date` as a dependency, despite not relying on it, leading to it being recreated too often. In the case of `Intl.DateTimeFormat`, [mdn specifically recommends creating it once and re-using it](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refere…
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