Make sure that the new dependancy on Serializer\Json is the last thing in the constructor

Author: dmanners

app/code/Magento/Checkout/Block/Cart/Shipping.php

@@ -31,8 +31,8 @@ class Shipping extends \Magento\Checkout\Block\Cart\AbstractCart
      * @param \Magento\Checkout\Model\Session $checkoutSession
      * @param \Magento\Checkout\Model\CompositeConfigProvider $configProvider
      * @param array $layoutProcessors
-     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
      * @param array $data
+     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
      * @throws \RuntimeException
      */
     public function __construct(
@@ -41,8 +41,8 @@ public function __construct(
         \Magento\Checkout\Model\Session $checkoutSession,
         \Magento\Checkout\Model\CompositeConfigProvider $configProvider,
         array $layoutProcessors = [],
-        \Magento\Framework\Serialize\Serializer\Json $serializer = null,
-        array $data = []
+        array $data = [],
+        \Magento\Framework\Serialize\Serializer\Json $serializer = null
     ) {
         $this->configProvider = $configProvider;
         $this->layoutProcessors = $layoutProcessors;

app/code/Magento/Checkout/Block/Cart/Sidebar.php

@@ -38,8 +38,8 @@ class Sidebar extends AbstractCart
      * @param \Magento\Checkout\Model\Session $checkoutSession
      * @param \Magento\Catalog\Helper\Image $imageHelper
      * @param \Magento\Customer\CustomerData\JsLayoutDataProviderPoolInterface $jsLayoutDataProvider
-     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
      * @param array $data
+     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
      * @throws \RuntimeException
      */
     public function __construct(
@@ -48,8 +48,8 @@ public function __construct(
         \Magento\Checkout\Model\Session $checkoutSession,
         \Magento\Catalog\Helper\Image $imageHelper,
         \Magento\Customer\CustomerData\JsLayoutDataProviderPoolInterface $jsLayoutDataProvider,
-        \Magento\Framework\Serialize\Serializer\Json $serializer = null,
-        array $data = []
+        array $data = [],
+        \Magento\Framework\Serialize\Serializer\Json $serializer = null
     ) {
         if (isset($data['jsLayout'])) {
             $this->jsLayout = array_merge_recursive($jsLayoutDataProvider->getData(), $data['jsLayout']);

app/code/Magento/Checkout/Block/Onepage.php

@@ -46,17 +46,17 @@ class Onepage extends \Magento\Framework\View\Element\Template
      * @param \Magento\Framework\Data\Form\FormKey $formKey
      * @param \Magento\Checkout\Model\CompositeConfigProvider $configProvider
      * @param array $layoutProcessors
-     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
      * @param array $data
+     * @param \Magento\Framework\Serialize\Serializer\Json|null $serializer
      * @throws \RuntimeException
      */
     public function __construct(
         \Magento\Framework\View\Element\Template\Context $context,
         \Magento\Framework\Data\Form\FormKey $formKey,
         \Magento\Checkout\Model\CompositeConfigProvider $configProvider,
         array $layoutProcessors = [],
-        \Magento\Framework\Serialize\Serializer\Json $serializer = null,
-        array $data = []
+        array $data = [],
+        \Magento\Framework\Serialize\Serializer\Json $serializer = null
     ) {
         parent::__construct($context, $data);
         $this->formKey = $formKey;

app/code/Magento/Checkout/Test/Unit/Block/Cart/ShippingTest.php

@@ -82,8 +82,8 @@ protected function setUp()
             $this->checkoutSession,
             $this->configProvider,
             [$this->layoutProcessor],
-            $this->serializer,
-            ['jsLayout' => $this->layout]
+            ['jsLayout' => $this->layout],
+            $this->serializer
         );
     }
 

app/code/Magento/Checkout/Test/Unit/Block/OnepageTest.php

@@ -66,8 +66,8 @@ protected function setUp()
             $this->formKeyMock,
             $this->configProviderMock,
             [$this->layoutProcessorMock],
-            $this->serializer,
-            []
+            [],
+            $this->serializer
         );
     }