Dotty needs to support overloaded methods that have same erazed arguments.

[DarkDimius]

Method is inherited from scala2 trait BCodeIdiomatic.
Seems to be a problem with overloads, as there should be 3 mkArray methods:

  final def mkArray(xs: List[BType]): Array[BType]
  final def mkArray(xs: List[String]): Array[String]
  final def mkArray(xs: List[asm.Label]): Array[asm.Label]

but only

  public final scala.tools.nsc.backend.jvm.BTypes$BType[] mkArray(scala.collection.immutable.List)

is actually emitted in bytecode.

[DarkDimius]

@odersky: a minimized example

// to be compiled by scalac
trait T{
 def foo(a: List[String]): String = "1"
 def foo(a: List[Int]): Int = 1
 foo(List("1"))
 foo(List(1))
}

// to be compiled by dotty
object Test extends T{
  def main(args: Array[String]): Unit = ()
}

Exception in thread "main" java.lang.AbstractMethodError: Test$.foo(Lscala/collection/immutable/List;)I
    at T$class.$init$(T.scala:5)
    at Test$.<init>(C.scala:1)
    at Test$.<clinit>(C.scala)
    at Test.main(C.scala)

> javap Test$
Compiled from "C.scala"
public final class Test$ {
  public static final C$ MODULE$;
  public static {};
  public C$();
  public java.lang.String foo(scala.collection.immutable.List);
  public void main(java.lang.String[]);
}

[odersky]

Was fixed by #812