Closure parameter type cannot be inferred when contextual type is pack expansion

[AnthonyLatsis]

Description

No response

Reproduction

func foo<each T>(_: repeat each T) {
  let _: (repeat each T) -> Void = { x in }
}

Expected behavior

Successful compilation

Environment

Swift version 6.2-dev (LLVM 1a588e5b044c46f, Swift 9e70208d907bb2d)

Additional information

No response

[xedin]

I think this might be a dupe, I remember a few similar reports…

[AnthonyLatsis]

I tried searching GitHub. Probably radars?

[xedin]

I will try to find it, I remember replying that closures are just not supported at the moment 😅

[AnthonyLatsis]

Ah, this?

[xedin]

I think the one I remember is related to using closure in a pack expansion pattern, so we might make this a sub-task of the umbrella?…

[AnthonyLatsis]

The umbrella was supposed to be for stuff like repeat <closure>. We could reopen and repurpose it, but I kind of regret creating it because one could have just fetched these issues by a label conjunction.