[fixes #2420] Copy vartype.type

src/utils/lombok/javac/TreeMirrorMaker.java

@@ -109,6 +109,8 @@ public class TreeMirrorMaker extends TreeCopier<Void> {
 			if (wipeSymAndType) {
 				copy.sym = null;
 				copy.type = null;
+			} else {
+				if (original.vartype != null) copy.vartype.type = original.vartype.type;
 			}
 		}
 		

test/transform/resource/after-delombok/ValAnonymousSubclassSelfReference.java

@@ -0,0 +1,9 @@
+public class ValAnonymousSubclassSelfReference {
+	public void test() {
+		int i = 0;
+		final int j = 1;
+		final int k = 2;
+		new ValAnonymousSubclassSelfReference() {
+		};
+	}
+}

test/transform/resource/after-ecj/ValAnonymousSubclassSelfReference.java

@@ -0,0 +1,16 @@
+import lombok.val;
+public class ValAnonymousSubclassSelfReference {
+  public ValAnonymousSubclassSelfReference() {
+    super();
+  }
+  public void test() {
+    int i = 0;
+    final @val int j = 1;
+    final @val int k = 2;
+    new ValAnonymousSubclassSelfReference() {
+      x() {
+        super();
+      }
+    };
+  }
+}

test/transform/resource/before/ValAnonymousSubclassSelfReference.java

@@ -0,0 +1,12 @@
+// issue 2420: to trigger the problem 2 var/val, one normal variable and a anonymous self reference is required
+import lombok.val;
+
+public class ValAnonymousSubclassSelfReference {
+	public void test() {
+		int i = 0;
+		val j = 1;
+		val k = 2;
+
+		new ValAnonymousSubclassSelfReference() { };
+	}
+}