Add missing contents to vitual files

Author: nicolasstucki

compiler/src/dotty/tools/dotc/util/SourceFile.scala

@@ -39,7 +39,7 @@ class SourceFile(val file: AbstractFile, computeContent: => Array[Char]) extends
   lazy val content = computeContent
 
   def this(file: AbstractFile, codec: Codec) = this(file, new String(file.toByteArray, codec.charSet).toCharArray)
-  def this(name: String, content: String) = this(new VirtualFile(name), content.toCharArray)
+  def this(name: String, content: String) = this(new VirtualFile(name, content.getBytes), scala.io.Codec.UTF8)
 
   /** Tab increment; can be overridden */
   def tabInc: Int = 8

compiler/src/dotty/tools/io/VirtualFile.scala

@@ -25,6 +25,19 @@ class VirtualFile(val name: String, override val path: String) extends AbstractF
    */
   def this(name: String) = this(name, name)
 
+  /**
+    * Initializes this instance with the specified name and an
+    * identical path.
+    *
+    * @param name the name of the virtual file to be created
+    * @param content the initial contents of the virtual file
+    * @return     the created virtual file
+    */
+  def this(name: String, content: Array[Byte]) = {
+    this(name)
+    this.content = content
+  }
+
   override def hashCode: Int = path.hashCode
   override def equals(that: Any): Boolean = that match {
     case x: VirtualFile => x.path == path

compiler/test-resources/repl/notFound

@@ -0,0 +1,4 @@
+scala>  Foo
+1 |  Foo
+  |  ^^^
+  |  Not found: Foo