Error type 'any P' cannot conform to 'P' fixed by unrelated statement

[SimplyDanny]

Description

Given the definitions

protocol P {}
func g(_: some P) {}
let list = [any P]()

the compiler reports the error type 'any P' cannot conform to 'P' on $0 passed to g in the code

list
  .map { $0 }
  .forEach { g($0) } // error

When I remove the .map line, everything is fine.

Reproduction

Now, to my surprise, it also compiles without an error if a totally unrelated statement is added to the .forEach block like in

list
  .map { $0 }
  .forEach { print(1); g($0) }

Expected behavior

I consider this a bug and expect the very first snippet to compile successfully as well.

Environment

This happens with a recent Swift 6.0.3 compiler on macOS and Linux.

Additional information

Playground: https://swiftfiddle.com/e3xsjlhqsbep3fnbctktirvqza