Regression in softwaremill/sttp - ignored overloaded member

[WojciechMazur]

Open Community Builder failure based on the following projects:

• softwaremill/sttp - build logs
• greenfossil/thorium - build logs

Compiler version

3.4.0-RC1-bin-20231117-5bb6f0d-NIGHTLY

Bisect points to 171773d

Minimized code

import java.util.Map.Entry;
import java.util.function.BiConsumer;
import java.lang.Iterable

trait HttpHeaders extends Iterable[Entry[String, String]] {
  def forEach(action: BiConsumer[String, String]): Unit = ???
}

@main def Test =
  val headers: HttpHeaders = ???
  headers.forEach((a, b) => ???)

Output

-- [E086] Syntax Error: /Users/wmazur/projects/dotty/bisect/main.scala:11:25 ---
11 |  headers.forEach((a, b) => ???)
   |                  ^^^^^^^^^^^^^
   |                  Wrong number of parameters, expected: 1
   |

Expectation

Should compile. Compiler should use the overloaded variant of forEach method taking a BiConsumer instead of Consumer[Entry[String,String] defined in Java stdlib.

[WojciechMazur]

Another reproducer found in dependency of the 2 libraries: http4s/http4s-armeria. Slightly different scenario.

import java.util.function.Function

trait HttpClient
trait HttpRequest
trait HttpResponse
trait ClientRequestContext

trait DecoratingHttpClientFunction {
  def execute(delegate: HttpClient, ctx: ClientRequestContext, req: HttpRequest): HttpResponse
}

class AbstractClientOptionsBuilder:
  def decorator(fn: Function[? <: HttpClient, ? <: HttpClient]): AbstractClientOptionsBuilder = ???
  def decorator(fn: DecoratingHttpClientFunction): AbstractClientOptionsBuilder = ???

class WebClientBuilder extends AbstractClientOptionsBuilder:
  override def decorator(fn: Function[? <: HttpClient, ? <: HttpClient]): WebClientBuilder = ???
  override def decorator(fn: DecoratingHttpClientFunction): WebClientBuilder = ???

class ArmeriaClientBuilder[F[_]]:
  type DecoratingFunction = (HttpClient, ClientRequestContext, HttpRequest) => HttpResponse
  def clientBuilder: WebClientBuilder = ???

  def withDecorator(decorator: DecoratingFunction): ArmeriaClientBuilder[F] = {
    clientBuilder.decorator(decorator(_, _, _))
    this
  }