From 22e0b732db892a4ab382ed0ed62ec8da261d69bd Mon Sep 17 00:00:00 2001
From: Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
Date: Tue, 3 Jun 2025 19:06:56 +0200
Subject: [PATCH] LibJS: Add missing update for holes count in
 IndexedPropertyStorage

This one is required to cover the case when new empty elements are
introduced by assigning to element with index > length, like:
```js
var x = [];
x[0] = 1;
x[2] = 2;
```
---
 Libraries/LibJS/Runtime/IndexedProperties.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Libraries/LibJS/Runtime/IndexedProperties.cpp b/Libraries/LibJS/Runtime/IndexedProperties.cpp
index f630de2cf43..40489b14901 100644
--- a/Libraries/LibJS/Runtime/IndexedProperties.cpp
+++ b/Libraries/LibJS/Runtime/IndexedProperties.cpp
@@ -48,6 +48,7 @@ void SimpleIndexedPropertyStorage::put(u32 index, Value value, PropertyAttribute
     VERIFY(attributes == default_attributes);
 
     if (index >= m_array_size) {
+        m_number_of_empty_elements += index - m_array_size;
         m_array_size = index + 1;
         grow_storage_if_needed();
     } else {