Completions not shown after a method call with a polymorphic function literal

[kubukoz]

Describe the bug

To reproduce:

1. Write

//> using scala 3.5.1

trait Builder[Alg] {
  def withTraces: String
}

trait BuilderFactory {

  def transformRouter(
    f: [Alg] => Builder[Alg] => String
  ): BuilderFactory

  def enhance: BuilderFactory
  def build: Unit
}

trait Demo {

  def demo = {
    val factory: BuilderFactory = ???

    val result =
      factory
        .enhance
        .transformRouter([Alg] => _.withTraces)
        // no completions after the above
        .build

    result
  }

}

2. Try to get completions after .transformRouter(...)<HERE>
3. See nothing (not even the build method present in code)

Expected behavior

Completions for enhance, build and transformRouter are shown.

Operating system

macOS

Editor/Extension

VS Code

Version of Metals

v1.3.5

Extra context or search terms

• works fine in scala-cli repl
• doesn't start working after upgrading to Scala 3 nightlies
• works fine if the polymorphic function is passed with an identifier rather than as a literal, e.g. val f = [Alg] => (_: Builder[Alg]).withTraces