Question mark in a closure gives an error

[maximebuyse]

fn test(x: Option<i32>, y: Option<i32>) -> Option<i32> {
    x.map(|i| Some(i + y?))?
}

Open this code snippet in the playground

This gives the following error:

error: [HAX0002] (DropReturnBreakContinue) Fatal error: something we considered as impossible occurred! Please report this by submitting an issue on GitHub!
Details: Return/Break/Continue are expected to be gone as this point
 --> src/lib.rs:3:24
  |
3 |     x.map(|i| Some(i + y?))?

This is another regression from #393.