From 8bda1db8c84991bb9efd97f83ec47f98680d9eea Mon Sep 17 00:00:00 2001
From: Robin Malfait <malfait.robin@gmail.com>
Date: Wed, 27 Aug 2025 17:15:26 +0200
Subject: [PATCH] do not assume `source` is an object

Otherwise `Reflect.ownKeys` would crash on non-object values.

Co-Authored-By: Jordan Pittman <thecrypticace@gmail.com>
---
 packages/tailwindcss/src/compat/config/deep-merge.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/tailwindcss/src/compat/config/deep-merge.ts b/packages/tailwindcss/src/compat/config/deep-merge.ts
index 2bf15c9b3..3365a068b 100644
--- a/packages/tailwindcss/src/compat/config/deep-merge.ts
+++ b/packages/tailwindcss/src/compat/config/deep-merge.ts
@@ -17,7 +17,7 @@ export function deepMerge<T extends object>(
   type Value = T[Key]
 
   for (let source of sources) {
-    if (source === null || source === undefined) {
+    if (source === null || source === undefined || typeof source !== 'object') {
       continue
     }