fix: Improper error when serializing a flattened property

README.md

@@ -371,8 +371,7 @@ There are some alternatives to this, but all of them will lack at least one of t
 - parses existing PHPDoc information instead of duplicating it through attributes
 - supports generic types which are extremely useful for wrapper types
 - allows simple extension through mappers and complex stuff through type adapters
-- produces developer-friendly error messages on invalid data
-- correctly handles optional and `null` values as separate concepts
+- produces developer-friendly error messages for invalid data
+- correctly handles optional (missing keys) and `null` values as separate concepts
 - simple to extend with additional formats
-- simple internal structure: no nodes, value wrappers or any limitations
-
+- simple internal structure: no node tree, no value wrappers, no PHP parsing, no inherent limitations

src/GoodPhp/Serialization/Serializer/Registry/Cache/MemoizingTypeAdapterRegistry.php

@@ -14,7 +14,7 @@
 
 final class MemoizingTypeAdapterRegistry implements TypeAdapterRegistry
 {
-	/** @var array<class-string, array<>> */
+	/** @var array<class-string, array<string, \WeakMap<object, array<int, array{ object[], TypeAdapter }>>>> */
 	private array $resolved = [];
 
 	public function __construct(

src/GoodPhp/Serialization/TypeAdapter/Primitive/ClassProperties/PropertyMappingException.php

@@ -25,11 +25,11 @@ public static function rethrow(BoundClassProperty|string $serializedName, callab
 		try {
 			return $callback();
 		} catch (PropertyMappingException $e) {
-			throw new self($serializedName ? $serializedName . '.' . $e->path : $e->path, $e->getPrevious());
+			throw new self($serializedName !== null ? $serializedName . '.' . $e->path : $e->path, $e->getPrevious());
 		} catch (CollectionItemMappingException $e) {
-			throw new self($serializedName ? $serializedName . '.' . $e->key : $e->key, $e->getPrevious());
+			throw new self($serializedName !== null ? $serializedName . '.' . $e->key : $e->key, $e->getPrevious());
 		} catch (Exception $e) {
-			throw new self($serializedName, $e);
+			throw $serializedName !== null ? new self($serializedName, $e) : $e;
 		}
 	}
 }