Varargs doesn't inherit overloads properly.

[Griffork]

TypeScript Version:

• Playground 4.1.0 beta with ESNext types.
• 3.9.x

Search Terms: ...args, call, typescript, varargs.

Code

type foo = ((val: true, obj: any)=>void) & ((val: false)=>void);
var test!: foo;
test(true, {});
test(false);
test.call(window, true, {}); //This errors, and shouldn't.
test.call(window, false);

Playground Link

Expected behavior:
test.call with 3 arguments doesn't error.

Actual behavior:
test.call with 3 arguments does error, because typescript force-chooses the last overload of an overloaded method.

Related Issues:
This issue is impossible to search for because "...args" and "call" are such generic terms, that a bunch of unrelated issues come up in the search result. I did go looking for duplicates but there is a high possibility that there's a duplicate out there that I wasn't able to find.

[jcalz]

Duplicate of #38353, putting "overload" in the search term found it for me.

[Griffork]

Thanks! I didn't try searching for that word on it's own.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.