[TypeDeclaration] Skip mixing native + docblock union assign on Typed…

…PropertyFromAssignsRector (#4905)

* [TypeDeclaration] Skip mixing native + docblock union assign on TypedPropertyFromAssignsRector

* Fixed 🎉

* [ci-review] Rector Rectify

---------

Co-authored-by: GitHub Action <actions@github.com>

rules-tests/TypeDeclaration/Rector/Property/TypedPropertyFromAssignsRector/Fixture/skip_mixed_native_with_docblock_union.php.inc

@@ -0,0 +1,24 @@
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector\Fixture;
+
+use DateTime;
+use stdClass;
+
+final class SkipNativeWithDocblockUnion
+{
+    private $property;
+
+    public function run1()
+    {
+        $this->property = new stdClass;
+    }
+
+    /**
+     * @param stdClass|DateTime $property
+     */
+    public function run2($property)
+    {
+        $this->property = $property;
+    }
+}

rules/TypeDeclaration/TypeInferer/AssignToPropertyTypeInferer.php

@@ -198,7 +198,8 @@ private function getAssignedExprTypes(ClassLike $classLike, string $propertyName
             }
 
             if ($this->exprAnalyzer->isNonTypedFromParam($node->expr)) {
-                return null;
+                $assignedExprTypes = [];
+                return NodeTraverser::STOP_TRAVERSAL;
             }
 
             $assignedExprTypes[] = $this->resolveExprStaticTypeIncludingDimFetch($node);