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-rw-r--r--vendor/symfony/cache/Traits/PhpFilesTrait.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/vendor/symfony/cache/Traits/PhpFilesTrait.php b/vendor/symfony/cache/Traits/PhpFilesTrait.php
index b57addb54f..37d25f87a9 100644
--- a/vendor/symfony/cache/Traits/PhpFilesTrait.php
+++ b/vendor/symfony/cache/Traits/PhpFilesTrait.php
@@ -133,7 +133,7 @@ trait PhpFilesTrait
*/
protected function doHave($id)
{
- if ($this->appendOnly && $this->values[$id]) {
+ if ($this->appendOnly && isset($this->values[$id])) {
return true;
}