Fix #1843

Author: cowtowncoder

release-notes/VERSION

@@ -13,6 +13,8 @@ Project: jackson-databind
  (reported byb henryptung@github)
 #1807: Jackson-databind caches plain map deserializer and use it even map has `@JsonDeserializer`
  (reported by lexas2509@github)
+#1843: Include name of unsettable property in exception from `SetterlessProperty.set()`
+ (suggested by andreh7@github)
 
 2.9.2 (14-Oct-2017)
 

src/main/java/com/fasterxml/jackson/databind/deser/impl/ObjectIdReferenceProperty.java

@@ -93,7 +93,7 @@ public Object deserializeSetAndReturn(JsonParser p, DeserializationContext ctxt,
         } catch (UnresolvedForwardReference reference) {
             boolean usingIdentityInfo = (_objectIdInfo != null) || (_valueDeserializer.getObjectIdReader() != null);
             if (!usingIdentityInfo) {
-                throw JsonMappingException.from(p, "Unresolved forward reference but no identity info.", reference);
+                throw JsonMappingException.from(p, "Unresolved forward reference but no identity info", reference);
             }
             reference.getRoid().appendReferring(new PropertyReferring(this, reference, _type.getRawClass(), instance));
             return null;

src/main/java/com/fasterxml/jackson/databind/deser/impl/SetterlessProperty.java

@@ -140,10 +140,10 @@ public Object deserializeSetAndReturn(JsonParser p,
         deserializeAndSet(p, ctxt, instance);
         return instance;
     }
-    
+
     @Override
     public final void set(Object instance, Object value) throws IOException {
-        throw new UnsupportedOperationException("Should never call 'set' on setterless property");
+        throw new UnsupportedOperationException("Should never call `set()` on setterless property ('"+getName()+"')");
     }
 
     @Override