a test for IDEA-98211 "Constant conditions & exceptions": warning about possible ClassCastException is shown in one case, but one in another similar one

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

@@ -0,0 +1,22 @@
+import java.util.Date;
+
+public class DataFlowBug {
+
+  private static boolean isNumberable(Object o) {
+    return o instanceof Number;
+  }
+
+  public Object add(Object left, Object right) {
+    if (left != null && right != null && (left instanceof Date || right instanceof Date)) {
+      if (isNumberable(left)) {
+        return ((<warning descr="Casting 'right' to 'Date' may produce 'java.lang.ClassCastException'">Date</warning>) right).getTime();
+      }
+
+      if (isNumberable(right)) {
+        return ((<warning descr="Casting 'left' to 'Date' may produce 'java.lang.ClassCastException'">Date</warning>) left).getTime();
+      }
+    }
+    return new Object();
+  }
+
+}