1 files changed, 8 insertions, 1 deletions
diff --git a/sources/scalac/symtab/SymbolSubstTypeMap.java b/sources/scalac/symtab/SymbolSubstTypeMap.java
index 5ba22ce7ae..f99cbbb1b0 100644
--- a/sources/scalac/symtab/SymbolSubstTypeMap.java
+++ b/sources/scalac/symtab/SymbolSubstTypeMap.java
@@ -135,7 +135,7 @@ public class SymbolSubstTypeMap extends Type.Map {
             if (value != null) return (Type)value;
             value = symbols.get(symbol);
             if (value == null) return super.map(type);
-            Type prefix = ((Type.TypeRef)type).pre;
+            Type prefix = ((Type.SingleType)type).pre;
             return Type.singleType(apply(prefix), (Symbol)value);
         }
 
@@ -147,6 +147,13 @@ public class SymbolSubstTypeMap extends Type.Map {
     }
 
     //########################################################################
+    // Public Methods - Printing
+
+    public String toString() {
+        return "{ symbols=" + symbols + " types=" + types + " }";
+    }
+
+    //########################################################################
     // Private Function
 
     private static boolean checkLeftContainsNoKeyFromRight(Map lf, Map rg) {