misleading error for case class with leading using clause

[rmgk]

Compiler version

At least 3.1.2 and 3.2.0-RC1-bin-20220514-bb29e20-NIGHTLY-git-bb29e20 (17.0.3, Java OpenJDK 64-Bit Server VM).

Minimized code

case class ACase(using Int)(normal: String)

Output

Error: A case class must have at least one non-implicit parameter list

Expectation

Either works using the first non-implicit argument list, or at least complains that it is not possible to have the first argument list implicit.

[bishabosha]

Thanks for reporting!, the message should be clear that there is at least one non-implicit parameter list, and that it comes first