(minor) usage of `scala.ContextFunction0` should produce "context function types require at least one parameter" error

[unkarjedy]

Scala 3.3.3

These 2 definitions are equivilent:

val v1: scala.ContextFunction0[String] = null
val v2: () ?=> String = null

The second one is a synthetic sugar for the first one.
The second second one reports error context function types require at least one parameter, but the first one compiles just fine which seem to make no sense.

I would be nice if the same error or a similar one was reported for the desugarred version of the context function type.