symfony
diff --git a/‎composer.json
Copy file name to clipboardExpand all lines: composer.json
+2-1Lines changed: 2 additions & 1 deletion b/‎composer.json
Copy file name to clipboardExpand all lines: composer.json
+2-1Lines changed: 2 additions & 1 deletion
diff --git a/‎src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
+2-2Lines changed: 2 additions & 2 deletions b/‎src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
+2-2Lines changed: 2 additions & 2 deletions
diff --git a/‎src/Symfony/Component/Config/composer.json
Copy file name to clipboardExpand all lines: src/Symfony/Component/Config/composer.json
+2-1Lines changed: 2 additions & 1 deletion b/‎src/Symfony/Component/Config/composer.json
Copy file name to clipboardExpand all lines: src/Symfony/Component/Config/composer.json
+2-1Lines changed: 2 additions & 1 deletion
@@ -49,7 +49,8 @@
         "symfony/polyfill-mbstring": "~1.0",
         "symfony/polyfill-php72": "~1.5",
         "symfony/polyfill-php73": "^1.11",
-        "symfony/polyfill-php80": "^1.15"
+        "symfony/polyfill-php80": "^1.15",
+        "symfony/polyfill-php81": "^1.22"
     },
     "replace": {
         "symfony/asset": "self.version",
 
@@ -225,7 +225,7 @@ protected function normalizeValue($value)
 
         $value = $this->remapXml($value);
 
-        $isAssoc = array_keys($value) !== range(0, \count($value) - 1);
+        $isAssoc = !array_is_list($value);
         $normalized = [];
         foreach ($value as $k => $v) {
             if (null !== $this->keyAttribute && \is_array($v)) {
@@ -304,7 +304,7 @@ protected function mergeValues($leftSide, $rightSide)
             return $rightSide;
         }
 
-        $isAssoc = array_keys($rightSide) !== range(0, \count($rightSide) - 1);
+        $isAssoc = !array_is_list($rightSide);
         foreach ($rightSide as $k => $v) {
             // prototype, and key is irrelevant there are no named keys, append the element
             if (null === $this->keyAttribute && !$isAssoc) {
 
@@ -18,7 +18,8 @@
     "require": {
         "php": ">=7.1.3",
         "symfony/filesystem": "^3.4|^4.0|^5.0",
-        "symfony/polyfill-ctype": "~1.8"
+        "symfony/polyfill-ctype": "~1.8",
+        "symfony/polyfill-php81": "^1.22"
     },
     "require-dev": {
         "symfony/event-dispatcher": "^3.4|^4.0|^5.0",