--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	Tue Aug 28 09:01:54 2018 +0200
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	Wed Aug 29 09:36:17 2018 +0200
@@ -180,7 +180,10 @@
         UNDERSCORE_IDENTIFIER(MIN, JDK8),
         PRIVATE_INTERFACE_METHODS(JDK9, Fragments.FeaturePrivateIntfMethods, DiagKind.PLURAL),
         LOCAL_VARIABLE_TYPE_INFERENCE(JDK10),
-        IMPORT_ON_DEMAND_OBSERVABLE_PACKAGES(JDK1_2, JDK8);
+        IMPORT_ON_DEMAND_OBSERVABLE_PACKAGES(JDK1_2, JDK8),
+        SWITCH_MULTIPLE_CASE_LABELS(JDK12, Fragments.FeatureMultipleCaseLabels, DiagKind.PLURAL),
+        SWITCH_RULE(JDK12, Fragments.FeatureSwitchRules, DiagKind.PLURAL),
+        SWITCH_EXPRESSION(JDK12, Fragments.FeatureSwitchExpressions, DiagKind.PLURAL);
 
         enum DiagKind {
             NORMAL,