8143852: Implement type variable renaming for functional interface most specific test

Reviewed-by: mcimadamore, vromero

langtools/test/tools/javac/lambda/MostSpecific19.java

@@ -0,0 +1,20 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8143852
+ * @summary Test that generic function interface method bounds are the same
+ * @compile/fail/ref=MostSpecific19.out -XDrawDiagnostics MostSpecific19.java
+ */
+class MostSpecific19 {
+    interface F1 { <X extends Number> Object apply(X arg); }
+    interface F2 { <Y extends Integer> String apply(Y arg); }
+
+    static void m1(F1 f) {}
+    static void m1(F2 f) {}
+
+    static String foo(Object in) { return "a"; }
+
+    void test() {
+        m1(MostSpecific19::foo);
+    }
+
+}