Array.from throws "Expected 1-3 arguments, but got 2."

[bowenni]

TypeScript Version: 2.9.0-dev.20180502

Search Terms:
Array.from

Code

Array.from<{}>([1], (num: number) => num);

Expected behavior:
No errors

Actual behavior:
error TS2554: Expected 1-3 arguments, but got 2.

Playground Link:
https://www.typescriptlang.org/play/#src=Array.from%3C%7B%7D%3E(%5B%5D%2C%20()%20%3D%3E%20%7B%7D)%3B

Related Issues:

CC @rkirov

[RyanCavanaugh]

Duplicate #19220; please put a little more effort into searching next time - you just had to put the error message into the search box or read the second page of search results for "Array.from"

[bowenni]

Sorry I thought this has something to do with Array.from type declarations and only searched for Array.from

[RyanCavanaugh]

Actually not really a duplicate since what you were expecting was no error - but this is the intended behavior because you provided a generic type argument arity that didn't match with any normal argument arity

[bowenni]

Thanks Ryan. I see the problem now (got confused by the error message).