From a1300d37975c855795fada9eceec99701747c1d6 Mon Sep 17 00:00:00 2001
From: Zaggy1024 <zaggy1024@gmail.com>
Date: Thu, 10 Nov 2022 19:54:43 -0600
Subject: AK: Don't crash in HashTable::clear_with_capacity on an empty table

When calling clear_with_capacity on an empty HashTable/HashMap, a null
deref would occur when trying to memset() m_buckets. Checking that it
has capacity before clearing fixes the issue.
---
 AK/HashTable.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'AK')

diff --git a/AK/HashTable.h b/AK/HashTable.h
index ad6f7de16e..b2d9b6fe08 100644
--- a/AK/HashTable.h
+++ b/AK/HashTable.h
@@ -291,6 +291,8 @@ public:
     }
     void clear_with_capacity()
     {
+        if (m_capacity == 0)
+            return;
         if constexpr (!Detail::IsTriviallyDestructible<T>) {
             for (auto* bucket : *this)
                 bucket->~T();
-- 
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