Fix problem dealing with symbolic import renames

Author: odersky

src/dotty/tools/dotc/typer/Typer.scala

@@ -165,7 +165,7 @@ class Typer extends Namer with TypeAssigner with Applications with Implicits wit
                   tree.pos)
           found
         }
-        val Name = name.toTermName
+        val Name = name.toTermName.decode
         selectors match {
           case Pair(Ident(from), Ident(Name)) :: rest =>
             val selName = if (name.isTypeName) from.toTypeName else from

tests/pos/seq-ordering.scala

@@ -0,0 +1,9 @@
+import Ordering.Implicits._
+
+class A {
+  import Predef.{ implicitly => ? }
+
+  ?[Ordering[List[Int]]]
+  ?[Ordering[IndexedSeq[(Int, String)]]]
+  ?[Ordering[Seq[Seq[Int]]]]
+}