diff -r 000000000000 -r 959103a6100f test/tools/javac/lambda/BadReturn.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/lambda/BadReturn.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,38 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  check that incompatible return types in lambdas are flagged with error
+ * @author  Maurizio Cimadamore
+ * @compile/fail/ref=BadReturn.out -XDrawDiagnostics BadReturn.java
+ */
+
+class BadReturn {
+
+    interface SAM {
+        Comparable<?> m();
+    }
+
+    static void testNeg1() {
+        SAM s = ()-> {
+            if (true) {
+                return "";
+            } else {
+                return System.out.println("");
+            }};
+    }
+
+    static void testNeg2() {
+        SAM s = ()-> { return System.out.println(""); };
+    }
+
+    static void testPos() {
+        SAM s = ()-> {
+            if (false) {
+                return 10;
+            }
+            else {
+                return true;
+            }};
+    }
+}