diff --git a/src/Symfony/Component/Cache/Traits/RedisTrait.php b/src/Symfony/Component/Cache/Traits/RedisTrait.php
index dabdde4e705ce..ac9d5e1a9c1b8 100644
--- a/src/Symfony/Component/Cache/Traits/RedisTrait.php
+++ b/src/Symfony/Component/Cache/Traits/RedisTrait.php
@@ -529,7 +529,11 @@ private function pipeline(\Closure $generator, $redis = null): \Generator
 
         if (!$redis instanceof \Predis\ClientInterface && 'eval' === $command && $redis->getLastError()) {
             $e = new \RedisException($redis->getLastError());
-            $results = array_map(function ($v) use ($e) { return false === $v ? $e : $v; }, $results);
+            $results = array_map(function ($v) use ($e) { return false === $v ? $e : $v; }, (array) $results);
+        }
+
+        if (\is_bool($results)) {
+            return;
         }
 
         foreach ($ids as $k => $id) {