From c2ebc21eaa10c2f526ed6e9a772de45d322b4916 Mon Sep 17 00:00:00 2001
From: Nedunchezhiyan-M <gokulmaran2002@gmail.com>
Date: Wed, 8 Apr 2026 23:21:05 +0530
Subject: [PATCH] Fix wrong variable in highlight callback cleanup

_setUpdateHighlightFor deletes from this._updateHighlightFor (a method)
instead of this._updateHighlightMap (the actual map). This means
highlight callbacks are never cleaned up when cells are removed,
causing a memory leak. The $FlowFixMe annotation was masking
the type error.
---
 packages/virtualized-lists/Lists/VirtualizedSectionList.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/packages/virtualized-lists/Lists/VirtualizedSectionList.js b/packages/virtualized-lists/Lists/VirtualizedSectionList.js
index 55a63f8866ff..4eb0cbd07cf9 100644
--- a/packages/virtualized-lists/Lists/VirtualizedSectionList.js
+++ b/packages/virtualized-lists/Lists/VirtualizedSectionList.js
@@ -433,8 +433,7 @@ class VirtualizedSectionList<
     if (updateHighlightFn != null) {
       this._updateHighlightMap[cellKey] = updateHighlightFn;
     } else {
-      // $FlowFixMe[prop-missing]
-      delete this._updateHighlightFor[cellKey];
+      delete this._updateHighlightMap[cellKey];
     }
   };