[CodeQuality] Skip stdClass in IssetOnPropertyObjectToPropertyExistsR…

…ector, as always nested (#3166)

rules-tests/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector/Fixture/skip_direct_std_class.php.inc

@@ -0,0 +1,12 @@
+<?php
+
+namespace Rector\Tests\CodeQuality\Rector\Isset_\IssetOnPropertyObjectToPropertyExistsRector\Fixture;
+
+use stdClass;
+
+final class SkipDirectStdClass
+{
+    public function x(stdClass $value) {
+        isset($value->property);
+    }
+}

rules-tests/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector/Fixture/skip_std_class_from_json.php.inc

@@ -0,0 +1,11 @@
+<?php
+
+namespace Rector\Tests\CodeQuality\Rector\Isset_\IssetOnPropertyObjectToPropertyExistsRector\Fixture;
+
+final class SkipStdClassFromJson
+{
+    public function run(string $contents) {
+        $result = json_decode($contents);
+        return isset($result->key->value);
+    }
+}

rules/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector.php

@@ -104,6 +104,10 @@ public function refactor(Node $node): ?Node
             $propertyFetchVarType = $this->getType($issetVar->var);
 
             if ($propertyFetchVarType instanceof TypeWithClassName) {
+                if ($propertyFetchVarType->getClassName() === 'stdClass') {
+                    continue;
+                }
+
                 if (! $this->reflectionProvider->hasClass($propertyFetchVarType->getClassName())) {
                     continue;
                 }
@@ -119,12 +123,6 @@ public function refactor(Node $node): ?Node
                 } else {
                     $newNodes[] = $this->createNotIdenticalToNull($issetVar);
                 }
-            } else {
-                $newNodes[] = $this->replaceToPropertyExistsWithNullCheck(
-                    $issetVar->var,
-                    $propertyFetchName,
-                    $issetVar
-                );
             }
         }