[Intl] fix #39100

AmirHo3ein13 · AmirHo3ein13 · commit 05070df0be31 · 2021-02-17T15:09:23.000+03:30
locale_parse returns null if `$locale` length is greater than `INTL_MAX_LOCALE_LEN`.
Set `$localeSubTags = ['language' =&gt; $locale]` if so.
diff --git a/src/Symfony/Component/Intl/Locale.php b/src/Symfony/Component/Intl/Locale.php
@@ -68,13 +68,7 @@ public static function getDefaultFallback(): ?string
     public static function getFallback(string $locale): ?string
     {
         if (\function_exists('locale_parse')) {
-            if (null === $localeSubTags = locale_parse($locale)) {
-                if (\defined('INTL_MAX_LOCALE_LEN')) {
-                    $message = sprintf('The length of $locale must be less than %s', \INTL_MAX_LOCALE_LEN);
-                }
-
-                throw new \InvalidArgumentException($message ?? '');
-            }
+            $localeSubTags = locale_parse($locale) ?? ['language' => $locale];
 
             if (1 === \count($localeSubTags)) {
                 if ('root' !== self::$defaultFallback && self::$defaultFallback === $localeSubTags['language']) {
diff --git a/src/Symfony/Component/Intl/Tests/LocaleTest.php b/src/Symfony/Component/Intl/Tests/LocaleTest.php
@@ -80,7 +80,6 @@ public function testLongLocaleFallback()
             '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';
 
-        $this->expectException(\InvalidArgumentException::class);
-        Locale::getFallback($locale);
+        $this->assertNull(Locale::getFallback($locale));
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -80,7 +80,6 @@ public function testLongLocaleFallback()`
`80`	`80`	`'LC_MONETARY=fr_FR.UTF-8;LC_MESSAGES=fr_FR.UTF-8;LC_PAPER=fr_FR.UTF-8;LC_NAME=fr_FR.UTF-8;'.`
`81`	`81`	`'LC_ADDRESS=fr_FR.UTF-8;LC_TELEPHONE=fr_FR.UTF-8;LC_MEASUREMENT=fr_FR.UTF-8;LC_IDENTIFICATION=fr_FR.UTF-8';`
`82`	`82`
`83`		`- $this->expectException(\InvalidArgumentException::class);`
`84`		`- Locale::getFallback($locale);`
	`83`	`+ $this->assertNull(Locale::getFallback($locale));`
`85`	`84`	`}`
`86`	`85`	`}`