One more (last?) fix backported from 3.0 for #4515 (#4550)

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/introspect/POJOPropertiesCollector.java

@@ -951,10 +951,12 @@ private boolean _addImplicitConstructor(PotentialCreators collector,
                     return false;
                 }
                 // if not, prefer Properties-based if explicit preference OR
-                // property with same name
-                if (!ctorDetector.singleArgCreatorDefaultsToProperties()
-                        && !props.containsKey(ctor.implicitNameSimple(0))) {
-                    return false;
+                // property with same name with at least one visible accessor
+                if (!ctorDetector.singleArgCreatorDefaultsToProperties()) {
+                    POJOPropertyBuilder prop = props.get(ctor.implicitNameSimple(0));
+                    if ((prop == null) || !prop.anyVisible() || prop.anyIgnorals()) {
+                        return false;
+                    }
                 }
             }
         }

src/test/java/com/fasterxml/jackson/databind/ser/RawValueTest.java

@@ -32,7 +32,7 @@ final static class ClassGetter<T>
     {
         protected final T _value;
 
-        protected ClassGetter(T value) { _value = value;}
+        protected ClassGetter(T v) { _value = v;}
 
         public T getNonRaw() { return _value; }