Merge branch 'MAGETWO-95945' into 2.3-bugfixes-020119

Author: dvoskoboinikov

dev/tests/static/framework/Magento/CodeMessDetector/Rule/Design/CookieAndSessionMisuse.php

@@ -82,10 +82,12 @@ private function isControllerPlugin(\ReflectionClass $class): bool
                     //Non-existing class (autogenerated perhaps) or doesn't have an argument.
                     continue;
                 }
-                $isAction = $argument->isSubclassOf(\Magento\Framework\App\ActionInterface::class)
-                    || $argument->getName() === \Magento\Framework\App\ActionInterface::class;
-                if ($isAction) {
-                    return true;
+                if ($argument) {
+                    $isAction = $argument->isSubclassOf(\Magento\Framework\App\ActionInterface::class)
+                        || $argument->getName() === \Magento\Framework\App\ActionInterface::class;
+                    if ($isAction) {
+                        return true;
+                    }
                 }
             }
         }
@@ -109,10 +111,12 @@ private function isBlockPlugin(\ReflectionClass $class): bool
                     //Non-existing class (autogenerated perhaps) or doesn't have an argument.
                     continue;
                 }
-                $isBlock = $argument->isSubclassOf(\Magento\Framework\View\Element\BlockInterface::class)
-                    || $argument->getName() === \Magento\Framework\View\Element\BlockInterface::class;
-                if ($isBlock) {
-                    return true;
+                if ($argument) {
+                    $isBlock = $argument->isSubclassOf(\Magento\Framework\View\Element\BlockInterface::class)
+                        || $argument->getName() === \Magento\Framework\View\Element\BlockInterface::class;
+                    if ($isBlock) {
+                        return true;
+                    }
                 }
             }
         }