From a89ced8eacd3b29e27c00609f34bf57040de09c9 Mon Sep 17 00:00:00 2001
From: bahram <a.bahrami9675@gmail.com>
Date: Sat, 13 Feb 2021 22:42:31 +0330
Subject: [PATCH] [Intl] fix Locale::getFallback() throwing exception on long
 $locale

---
 src/Symfony/Component/Intl/Locale.php           |  3 ++-
 src/Symfony/Component/Intl/Tests/LocaleTest.php | 12 ++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Intl/Locale.php b/src/Symfony/Component/Intl/Locale.php
index 0373844e76c5..3d07e42b13ba 100644
--- a/src/Symfony/Component/Intl/Locale.php
+++ b/src/Symfony/Component/Intl/Locale.php
@@ -68,7 +68,8 @@ public static function getDefaultFallback(): ?string
     public static function getFallback(string $locale): ?string
     {
         if (\function_exists('locale_parse')) {
-            $localeSubTags = locale_parse($locale);
+            $localeSubTags = locale_parse($locale) ?? ['language' => $locale];
+
             if (1 === \count($localeSubTags)) {
                 if ('root' !== self::$defaultFallback && self::$defaultFallback === $localeSubTags['language']) {
                     return 'root';
diff --git a/src/Symfony/Component/Intl/Tests/LocaleTest.php b/src/Symfony/Component/Intl/Tests/LocaleTest.php
index fd998612a7ea..fce214242a47 100644
--- a/src/Symfony/Component/Intl/Tests/LocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/LocaleTest.php
@@ -70,4 +70,16 @@ public function testDefaultRootFallback()
 
         Locale::setDefaultFallback($prev);
     }
+
+    /**
+     * @requires function locale_parse
+     */
+    public function testLongLocaleFallback()
+    {
+        $locale = 'LC_TYPE=fr_FR.UTF-8;LC_NUMERIC=C;LC_TIME=fr_FR.UTF-8;LC_COLLATE=fr_FR.UTF-8;'.
+            'LC_MONETARY=fr_FR.UTF-8;LC_MESSAGES=fr_FR.UTF-8;LC_PAPER=fr_FR.UTF-8;LC_NAME=fr_FR.UTF-8;'.
+            'LC_ADDRESS=fr_FR.UTF-8;LC_TELEPHONE=fr_FR.UTF-8;LC_MEASUREMENT=fr_FR.UTF-8;LC_IDENTIFICATION=fr_FR.UTF-8';
+
+        $this->assertNull(Locale::getFallback($locale));
+    }
 }