From e452d6f1e21844a19b63cd86e5867cbaeeb79119 Mon Sep 17 00:00:00 2001
From: Jovi De Croock <decroockjovi@gmail.com>
Date: Mon, 21 Oct 2024 11:45:13 +0200
Subject: [PATCH] fix(core): Fix our array returns (#3696)

---
 .changeset/thin-cougars-give.md   | 5 +++++
 packages/core/src/utils/result.ts | 8 +++-----
 2 files changed, 8 insertions(+), 5 deletions(-)
 create mode 100644 .changeset/thin-cougars-give.md

diff --git a/.changeset/thin-cougars-give.md b/.changeset/thin-cougars-give.md
new file mode 100644
index 0000000000..4f0d04fa2d
--- /dev/null
+++ b/.changeset/thin-cougars-give.md
@@ -0,0 +1,5 @@
+---
+'@urql/core': patch
+---
+
+Fix `deepMerge` regression on array values
diff --git a/packages/core/src/utils/result.ts b/packages/core/src/utils/result.ts
index 81c04d4b8c..cdcf0a589a 100644
--- a/packages/core/src/utils/result.ts
+++ b/packages/core/src/utils/result.ts
@@ -57,12 +57,10 @@ const deepMerge = (target: any, source: any): any => {
       target = [...target];
       for (let i = 0, l = source.length; i < l; i++)
         target[i] = deepMerge(target[i], source[i]);
+
+      return target;
     }
-    if (
-      !target.constructor ||
-      target.constructor === Object ||
-      Array.isArray(target)
-    ) {
+    if (!target.constructor || target.constructor === Object) {
       target = { ...target };
       for (const key in source)
         target[key] = deepMerge(target[key], source[key]);