@NotNull instrumentation: added test for duplicated labels in tableswitch instruction (IDEA-CR-11417)

java/java-tests/testData/compiler/notNullVerification/MultipleMessages.java

@@ -0,0 +1,19 @@
+import org.jetbrains.annotations.NotNull;
+
+public class MultipleMessages {
+  @NotNull
+  public Object foo1() {
+    return null;
+  }
+
+  @NotNull
+  public Object foo2() {
+    return null;
+  }
+
+  public void bar1(@NotNull Object a) {
+  }
+
+  public void bar2(@NotNull Object b) {
+  }
+}