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typeof item in Array incrorrectΒ #46304
Description
Bug Report
text[key]on left infer tonever??? but whytext[key]on right infer tostring | number?
π Search Terms
π Version & Regression Information
typescript - 4.5.0
- This is a crash
β― Playground Link
π» Code
interface Item {
id: number;
name: string;
age: number;
}
const form: Item = {
id: 99,
name: 'k',
age: 99,
};
const text: Item = {
id: 1,
name: 'εΌ δΈ',
age: 18,
};
(['id','name','age'] as const).forEach(key => {
text[key] = text[key];
});
// Type 'string | number' is not assignable to type 'never'.
// Type 'string' is not assignable to type 'never'.π Actual behavior
bug occured
π Expected behavior
no bug
Activity
jcalz commentedon Oct 11, 2021
Working as intended, as per #30769. Possible duplicate of #32693
fatcerberus commentedon Oct 11, 2021
Uh... no it's not? Nor is it a bug. It's just an error you didn't expect.
typescript-bot commentedon Oct 14, 2021
This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.