Adding parameter types for functions if necessary.

#KT-2637 in progress

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetPsiFactory.java

@@ -112,6 +112,14 @@ public class JetPsiFactory {
         return semicolon;
     }
 
+    //the pair contains the first and the last elements of a range
+    @NotNull
+    public static Pair<PsiElement, PsiElement> createWhitespaceAndArrow(Project project) {
+        JetFunctionType functionType = (JetFunctionType) createType(project, "() -> Int").getTypeElement();
+        assert functionType != null;
+        return Pair.create(functionType.findElementAt(2), functionType.findElementAt(3));
+    }
+
     public static PsiElement createWhiteSpace(Project project) {
         return createWhiteSpace(project, " ");
     }

compiler/frontend/src/org/jetbrains/jet/lang/types/ErrorUtils.java

@@ -49,6 +49,10 @@ public class ErrorUtils {
         if (containsErrorType(function.getReturnType())) {
             return true;
         }
+        ReceiverParameterDescriptor receiverParameter = function.getReceiverParameter();
+        if (receiverParameter != null && containsErrorType(receiverParameter.getType())) {
+            return true;
+        }
         for (ValueParameterDescriptor parameter : function.getValueParameters()) {
             if (containsErrorType(parameter.getType())) {
                 return true;