Merge branch '3.4' into 4.4

* 3.4:
  Fixes sprintf(): Too few arguments in form transformer
  [Console] Fix QuestionHelper::disableStty()
  validate subforms in all validation groups
  Update Hungarian translations
  Add meaningful message when Process is not installed (ProcessHelper)
  [PropertyAccess] Fix TypeError parsing again.
  [Form] add missing Czech validators translation
  [Validator] add missing Czech translations
  never directly validate Existence (Required/Optional) constraints

Author: nicolas-grekas

PropertyAccessor.php

@@ -392,9 +392,15 @@ private function readProperty(array $zval, string $property, bool $ignoreInvalid
                 try {
                     $result[self::VALUE] = $object->{$access[self::ACCESS_NAME]}();
                 } catch (\TypeError $e) {
+                    list($trace) = $e->getTrace();
+
                     // handle uninitialized properties in PHP >= 7
-                    if (preg_match((sprintf('/^Return value of %s::%s\(\) must be of (?:the )?type (\w+), null returned$/', preg_quote(\get_class($object)), $access[self::ACCESS_NAME])), $e->getMessage(), $matches)) {
-                        throw new AccessException(sprintf('The method "%s::%s()" returned "null", but expected type "%3$s". Did you forget to initialize a property or to make the return type nullable using "?%3$s"?', \get_class($object), $access[self::ACCESS_NAME], $matches[1]), 0, $e);
+                    if (__FILE__ === $trace['file']
+                        && $access[self::ACCESS_NAME] === $trace['function']
+                        && $object instanceof $trace['class']
+                        && preg_match((sprintf('/Return value (?:of .*::\w+\(\) )?must be of (?:the )?type (\w+), null returned$/')), $e->getMessage(), $matches)
+                    ) {
+                        throw new AccessException(sprintf('The method "%s::%s()" returned "null", but expected type "%3$s". Did you forget to initialize a property or to make the return type nullable using "?%3$s"?', false === strpos(\get_class($object), "@anonymous\0") ? \get_class($object) : (get_parent_class($object) ?: 'class').'@anonymous', $access[self::ACCESS_NAME], $matches[1]), 0, $e);
                     }
 
                     throw $e;

Tests/PropertyAccessorTest.php

@@ -155,6 +155,59 @@ public function testGetValueThrowsExceptionIfUninitializedPropertyWithGetter()
         $this->propertyAccessor->getValue(new UninitializedPrivateProperty(), 'uninitialized');
     }
 
+    /**
+     * @requires PHP 7
+     */
+    public function testGetValueThrowsExceptionIfUninitializedPropertyWithGetterOfAnonymousClass()
+    {
+        $this->expectException('Symfony\Component\PropertyAccess\Exception\AccessException');
+        $this->expectExceptionMessage('The method "class@anonymous::getUninitialized()" returned "null", but expected type "array". Did you forget to initialize a property or to make the return type nullable using "?array"?');
+
+        $object = eval('return new class() {
+            private $uninitialized;
+
+            public function getUninitialized(): array
+            {
+                return $this->uninitialized;
+            }
+        };');
+
+        $this->propertyAccessor->getValue($object, 'uninitialized');
+    }
+
+    /**
+     * @requires PHP 7
+     */
+    public function testGetValueThrowsExceptionIfUninitializedPropertyWithGetterOfAnonymousStdClass()
+    {
+        $this->expectException('Symfony\Component\PropertyAccess\Exception\AccessException');
+        $this->expectExceptionMessage('The method "stdClass@anonymous::getUninitialized()" returned "null", but expected type "array". Did you forget to initialize a property or to make the return type nullable using "?array"?');
+
+        $object = eval('return new class() extends \stdClass {
+            private $uninitialized;
+
+            public function getUninitialized(): array
+            {
+                return $this->uninitialized;
+            }
+        };');
+
+        $this->propertyAccessor->getValue($object, 'uninitialized');
+    }
+
+    /**
+     * @requires PHP 7
+     */
+    public function testGetValueThrowsExceptionIfUninitializedPropertyWithGetterOfAnonymousChildClass()
+    {
+        $this->expectException('Symfony\Component\PropertyAccess\Exception\AccessException');
+        $this->expectExceptionMessage('The method "Symfony\Component\PropertyAccess\Tests\Fixtures\UninitializedPrivateProperty@anonymous::getUninitialized()" returned "null", but expected type "array". Did you forget to initialize a property or to make the return type nullable using "?array"?');
+
+        $object = eval('return new class() extends \Symfony\Component\PropertyAccess\Tests\Fixtures\UninitializedPrivateProperty {};');
+
+        $this->propertyAccessor->getValue($object, 'uninitialized');
+    }
+
     public function testGetValueThrowsExceptionIfNotArrayAccess()
     {
         $this->expectException('Symfony\Component\PropertyAccess\Exception\NoSuchIndexException');