Dotty 0.20.0-RC1: Cannot write a given alias for a function

[j-mie6]

minimized code

given (Int => Int) = identity[Int]

Produces three errors:
end of statement expected but '(' found
';' expected, but identifier found
anonymous instance must implement a type or have at least one extension method

expectation

The code above should work, just like the below does:

type IntFunc = Int => Int
given IntFunc = identity[Int]

[nicolasstucki]

I am not sure if the current syntax is supposed to allow it.

[j-mie6]

It worked as of 0.19.0-RC1, which was the release that I would have expected that to have been banned in... Seems a shame to either use type aliases or I assume Function[Int, Int] would work too.

[odersky]

This will be fixed by #7557.