diff -r 4ff3f9d83fe5 -r f15d443f9731 src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	Wed Jan 09 15:36:20 2019 +0100
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	Wed Jan 09 11:13:00 2019 -0400
@@ -184,8 +184,7 @@
         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),
-        RAW_STRING_LITERALS(JDK12, Fragments.FeatureRawStringLiterals, DiagKind.PLURAL);
+        SWITCH_EXPRESSION(JDK12, Fragments.FeatureSwitchExpressions, DiagKind.PLURAL);
 
         enum DiagKind {
             NORMAL,