Use kotlin jvm inline class synthetic constructors

Author: wplong11

src/main/java/com/fasterxml/jackson/databind/ext/KotlinSupport.java

@@ -0,0 +1,15 @@
+package com.fasterxml.jackson.databind.ext;
+
+import java.lang.reflect.Constructor;
+
+public class KotlinSupport {
+    public static boolean isJvmInlineClassSyntheticConstructor(Constructor<?> ctor) {
+        Class<?>[] params = ctor.getParameterTypes();
+        if (params.length == 0) {
+            return false;
+        }
+
+        Class<?> lastParam = params[params.length - 1];
+        return ctor.isSynthetic() && lastParam.getName().equals("kotlin.jvm.internal.DefaultConstructorMarker");
+    }
+}

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

@@ -11,6 +11,7 @@
 
 import com.fasterxml.jackson.databind.AnnotationIntrospector;
 import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.ext.KotlinSupport;
 import com.fasterxml.jackson.databind.introspect.AnnotatedClass.Creators;
 import com.fasterxml.jackson.databind.type.TypeFactory;
 import com.fasterxml.jackson.databind.util.ClassUtil;
@@ -406,6 +407,6 @@ private final AnnotationMap collectAnnotations(AnnotatedElement main, AnnotatedE
 
     // for [databind#1005]: do not use or expose synthetic constructors
     private static boolean isIncludableConstructor(Constructor<?> c) {
-        return !c.isSynthetic();
+        return !c.isSynthetic() || KotlinSupport.isJvmInlineClassSyntheticConstructor(c);
     }
 }