Closed
Description
openedon Mar 16, 2019
TypeScript Version: 3.4.0-rc
Search Terms: Type parameters, generics, inference, regression
Code
const foo = <T>() => {};
const assign = <T, U>(a: T, b: U) => Object.assign(a, b);
const result: (() => void) & { foo: any } = assign(() => {}, { foo });Expected behavior:
No error
Actual behavior:
Argument of type '{ foo: <T>() => void; }' is not assignable to parameter of type '(() => void) & { foo: any; }'.
Type '{ foo: <T>() => void; }' is not assignable to type '() => void'.
Type '{ foo: <T>() => void; }' provides no match for the signature '(): void'.
Related Issues:
Removing <T> from foo makes this code valid.
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