diff -r 1985e35e97b2 -r 7873d37f5b37 src/share/classes/com/sun/tools/javac/code/Source.java
--- a/src/share/classes/com/sun/tools/javac/code/Source.java	Mon Jan 21 11:16:28 2013 -0800
+++ b/src/share/classes/com/sun/tools/javac/code/Source.java	Mon Jan 21 20:13:56 2013 +0000
@@ -218,6 +218,12 @@
     public boolean allowIntersectionTypesInCast() {
         return compareTo(JDK1_8) >= 0;
     }
+    public boolean allowEarlyReturnConstraints() {
+        return compareTo(JDK1_8) >= 0;
+    }
+    public boolean allowStructuralMostSpecific() {
+        return compareTo(JDK1_8) >= 0;
+    }
     public static SourceVersion toSourceVersion(Source source) {
         switch(source) {
         case JDK1_2: