[Config] Fix EnumNode invalid value message

fancyweb · fancyweb · commit fd48818b44c1 · 2023-01-20T19:12:46.000+01:00
diff --git a/src/Symfony/Component/Config/Definition/EnumNode.php b/src/Symfony/Component/Config/Definition/EnumNode.php
@@ -48,7 +48,7 @@ protected function finalizeValue(mixed $value): mixed
         $value = parent::finalizeValue($value);
 
         if (!\in_array($value, $this->values, true)) {
-            $ex = new InvalidConfigurationException(sprintf('The value %s is not allowed for path "%s". Permissible values: %s', json_encode($value), $this->getPath(), implode(', ', array_map('json_encode', $this->values))));
+            $ex = new InvalidConfigurationException(sprintf('The value %s is not allowed for path "%s". Permissible values: %s', json_encode($value), $this->getPath(), implode(', ', array_unique(array_map('json_encode', $this->values)))));
             $ex->setPath($this->getPath());
 
             throw $ex;
