From a91a93238264ca5f473d51af70c3615ae436832f Mon Sep 17 00:00:00 2001
From: Zach Borboa <zachborboa@gmail.com>
Date: Wed, 10 Dec 2025 20:30:55 -0500
Subject: [PATCH] Fix psalm error (#1027)

ERROR: PossiblyNullArrayOffset - ../src/Curl/CaseInsensitiveArray.php:183:16 - Cannot access value on variable $this->keys using possibly null offset array-key|null (see https://psalm.dev/125)
        return $this->keys[$key] ?? $key;
---
 src/Curl/CaseInsensitiveArray.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Curl/CaseInsensitiveArray.php b/src/Curl/CaseInsensitiveArray.php
index bc2daca..96afb38 100644
--- a/src/Curl/CaseInsensitiveArray.php
+++ b/src/Curl/CaseInsensitiveArray.php
@@ -180,7 +180,11 @@ class CaseInsensitiveArray implements \ArrayAccess, \Countable, \Iterator
     public function key()
     {
         $key = key($this->data);
-        return $this->keys[$key] ?? $key;
+        if ($key === null) {
+            return null;
+        } else {
+            return $this->keys[$key] ?? $key;
+        }
     }
 
     /**