IDEA-146122 Wrong 'can produce NPE' after comparing with enum constant

java/java-tests/testData/inspection/dataFlow/fixture/CompareToEnumConstant.java

@@ -0,0 +1,21 @@
+import org.jetbrains.annotations.Nullable;
+
+enum MyEnum {
+  ITEM,
+  ANOTHER_ITEM,
+  LOL_ITEM;
+}
+
+@SuppressWarnings({"UseOfSystemOutOrSystemErr", "unused"})
+class Main {
+  void foo(@Nullable MyEnum myEnum) {
+    if (myEnum == null) return;
+    switch (myEnum) {
+      case ITEM:
+      case ANOTHER_ITEM:
+        System.out.println(myEnum == MyEnum.ITEM ? "item" : "another");
+        myEnum.name();
+      default:
+    }
+  }
+}