Workaround #1116

Author: DarkDimius

src/dotty/tools/dotc/reporting/ConsoleReporter.scala

@@ -14,10 +14,22 @@ import scala.reflect.internal.util._
  * console.
  */
 class ConsoleReporter(
-    reader: BufferedReader = Console.in,
-    writer: PrintWriter = new PrintWriter(Console.err, true))
+    reader: BufferedReader,
+    writer: PrintWriter)
   extends Reporter with UniqueMessagePositions {
 
+  def this(writer: PrintWriter) = {
+    this(Console.in, writer)
+  }
+
+  def this(reader: BufferedReader) = {
+    this(reader, new PrintWriter(Console.err, true))
+  }
+
+  def this() = {
+    this(Console.in)
+  }
+
   /** maximal number of error messages to be printed */
   protected def ErrorLimit = 100