diff -r 14e098407bb0 -r ad69fd32778e src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java	Mon Oct 21 15:11:44 2019 +0200
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java	Mon Oct 21 15:38:26 2019 +0200
@@ -214,6 +214,7 @@
     public final Type documentedType;
     public final Type elementTypeType;
     public final Type functionalInterfaceType;
+    public final Type previewFeatureType;
 
     /** The symbol representing the length field of an array.
      */
@@ -570,6 +571,7 @@
         lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
         stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
         functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
+        previewFeatureType = enterClass("jdk.internal.PreviewFeature");
 
         synthesizeEmptyInterfaceIfMissing(autoCloseableType);
         synthesizeEmptyInterfaceIfMissing(cloneableType);