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Derivation fails for Named Tuples #2328

@vkorenev

Description

@vkorenev

Read.derived[(String, Int)] compiles just fine while Read.derived[(a: String, b: Int)] fails with an error:

//> using scala 3.7.3
//> using dep "org.tpolecat::doobie-core::1.0.0-RC10"
import doobie.*
import doobie.implicits.*

val _ = Read.derived[(String, Int)]

val _ = Read.derived[(a: String, b: Int)] 

@main
def main() = {}
Compiling project (Scala 3.7.3, JVM (21))
[error] ./sc.scala:8:22
[error] Type argument (a : String, b : Int) does not conform to upper bound Product
[error] val _ = Read.derived[(a: String, b: Int)] 
[error]                      ^
Error compiling project (Scala 3.7.3, JVM (21))

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