Fix #2378

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -910,6 +910,10 @@ Victor Noël (victornoel@github)
   * Reported #2339: Suboptimal return type for `ObjectNode.set()`
    (2.10.0)
 
+David Harris (toadzky@github)
+  * Reported #2378: `@JsonAlias` doesn't work with AutoValue
+   (2.10.0)
+
 Sam Smith (Oracle Security Researcher)
   * Suggested #2398: Replace recursion in `TokenBuffer.copyCurrentStructure()` with iteration
 

release-notes/VERSION-2.x

@@ -13,6 +13,8 @@ Project: jackson-databind
 #2336: `MapDeserializer` can not merge `Map`s with polymorphic values
  (reported by Robert G)
 #2349: Add option `DefaultTyping.EVERYTHING` to support Kotlin data classes
+#2378: `@JsonAlias` doesn't work with AutoValue
+ (reported by David H)
 #2390: `Iterable` serialization breaks when adding `@JsonFilter` annotation
  (reported by Chris M)
 #2392: `BeanDeserializerModifier.modifyDeserializer()` not applied to custom bean deserializers

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

@@ -114,7 +114,10 @@ public static PropertyBasedCreator construct(DeserializationContext ctxt,
         }
         return new PropertyBasedCreator(ctxt, valueInstantiator, creatorProps,
                 allProperties.isCaseInsensitive(),
-                allProperties.hasAliases());
+// 05-Sep-2019, tatu: As per [databind#2378] looks like not all aliases get merged into
+//    `allProperties` so force lookup anyway.
+//                allProperties.hasAliases()
+                true);
     }
 
     /**

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

@@ -128,7 +128,10 @@ public List<PropertyName> findAliases(MapperConfig<?> config)
         if (aliases == null) {
             AnnotationIntrospector intr = config.getAnnotationIntrospector();
             if (intr != null) {
-                aliases = intr.findPropertyAliases(getMember());
+                final AnnotatedMember member = getMember();
+                if (member != null) {
+                    aliases = intr.findPropertyAliases(member);
+                }
             }
             if (aliases == null) {
                 aliases = Collections.emptyList();