[PropertyAccess] Fix setting public property on a class having a magi…

…c getter

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | N/A

When using PropertyAccessor with an object having both a public property
and a magic getter, and one wants to update this property,
PropertyAccessor may lose the property reference.
This occurs when the public property value is a hash:

```php
class Foo
{
    /**
     * Example: $this->someProperty['foo']['bar'] = 'baz'
     * @var array
     */
    public $someProperty;

    public function __get($name)
    {
        // ...
    }
}

$obj = new Foo();
$obj->someProperty = ['foo' => ['bar' => 'some_value']];

$propertyAccessor->setValue($obj, 'someProperty[foo][bar]', 'another_value');

echo $obj->someProperty['foo']['bar'];
// Before this patch: 'some_value' => fail
// After this patch: 'another_value' => correct
```

Furthermore, public properties are always used before `__get()` by PHP.

This bug is visible since v2.6.5 as d733a88 changed the way
`setValue()` works.

src/Symfony/Component/PropertyAccess/PropertyAccessor.php

@@ -314,11 +314,11 @@ private function &readProperty(&$object, $property)
             $result[self::VALUE] = $object->$isser();
         } elseif ($reflClass->hasMethod($hasser) && $reflClass->getMethod($hasser)->isPublic()) {
             $result[self::VALUE] = $object->$hasser();
-        } elseif ($reflClass->hasMethod('__get') && $reflClass->getMethod('__get')->isPublic()) {
-            $result[self::VALUE] = $object->$property;
         } elseif ($classHasProperty && $reflClass->getProperty($property)->isPublic()) {
             $result[self::VALUE] = &$object->$property;
             $result[self::IS_REF] = true;
+        } elseif ($reflClass->hasMethod('__get') && $reflClass->getMethod('__get')->isPublic()) {
+            $result[self::VALUE] = $object->$property;
         } elseif (!$classHasProperty && property_exists($object, $property)) {
             // Needed to support \stdClass instances. We need to explicitly
             // exclude $classHasProperty, otherwise if in the previous clause
@@ -410,10 +410,10 @@ private function writeProperty(&$object, $property, $value)
             $object->$setter($value);
         } elseif ($this->isMethodAccessible($reflClass, $getsetter, 1)) {
             $object->$getsetter($value);
-        } elseif ($this->isMethodAccessible($reflClass, '__set', 2)) {
-            $object->$property = $value;
         } elseif ($classHasProperty && $reflClass->getProperty($property)->isPublic()) {
             $object->$property = $value;
+        } elseif ($this->isMethodAccessible($reflClass, '__set', 2)) {
+            $object->$property = $value;
         } elseif (!$classHasProperty && property_exists($object, $property)) {
             // Needed to support \stdClass instances. We need to explicitly
             // exclude $classHasProperty, otherwise if in the previous clause

src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestClassMagicGet.php

@@ -15,6 +15,8 @@ class TestClassMagicGet
 {
     private $magicProperty;
 
+    public $publicProperty;
+
     public function __construct($value)
     {
         $this->magicProperty = $value;

src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php

@@ -438,4 +438,12 @@ public function testTicket5755()
 
         $this->assertEquals('foobar', $object->getProperty());
     }
+
+    public function testSetValueDeepWithMagicGetter()
+    {
+        $obj = new TestClassMagicGet('foo');
+        $obj->publicProperty = array('foo' => array('bar' => 'some_value'));
+        $this->propertyAccessor->setValue($obj, 'publicProperty[foo][bar]', 'Updated');
+        $this->assertSame('Updated', $obj->publicProperty['foo']['bar']);
+    }
 }