JacksonDatabind-16.md

Repilot Patch

        return (previous == null) || !previous.equals(ann);

Developer Patch

        return (previous == null) || !previous.equals(ann);

Context

--- bug/JacksonDatabind-16/src/main/java/com/fasterxml/jackson/databind/introspect/AnnotationMap.java

+++ fix/JacksonDatabind-16/src/main/java/com/fasterxml/jackson/databind/introspect/AnnotationMap.java

@@ -109,7 +109,7 @@

             _annotations = new HashMap<Class<? extends Annotation>,Annotation>();
         }
         Annotation previous = _annotations.put(ann.annotationType(), ann);
-        return (previous != null) && previous.equals(ann);
+        return (previous == null) || !previous.equals(ann);
     }
 }

Note