From dde442f1c17f283f36d5494ca03cfd134c1ffa15 Mon Sep 17 00:00:00 2001
From: Thomas Calvet <calvet.thomas@gmail.com>
Date: Mon, 20 Apr 2020 12:17:32 +0200
Subject: [PATCH] [Routing][PrefixTrait] Add the _locale requirement

---
 .../Component/Routing/Loader/Configurator/Traits/PrefixTrait.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php b/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php
index 5c109f942f11f..27053bcaf546b 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/Traits/PrefixTrait.php
@@ -33,6 +33,7 @@ final protected function addPrefix(RouteCollection $routes, $prefix, bool $trail
                     foreach ($prefix as $locale => $localePrefix) {
                         $localizedRoute = clone $route;
                         $localizedRoute->setDefault('_locale', $locale);
+                        $localizedRoute->setRequirement('_locale', preg_quote($locale));
                         $localizedRoute->setDefault('_canonical_route', $name);
                         $localizedRoute->setPath($localePrefix.(!$trailingSlashOnRoot && '/' === $route->getPath() ? '' : $route->getPath()));
                         $routes->add($name.'.'.$locale, $localizedRoute);