From fae172e207820d340d5f2c1ee6a02929aec3a3b4 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 27 Mar 2026 07:47:30 +0000
Subject: [PATCH 1/2] Initial plan


From 53b4a97c54d986756f1aa0f0c06776e3814c3af6 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 27 Mar 2026 07:56:15 +0000
Subject: [PATCH 2/2] Fix memory leak, unsafe non-null assertion, and stale
 useMemo dependencies

Agent-Logs-Url: https://github.com/daihua2/material-react-table/sessions/5976911b-bb2b-4c39-92a2-a3f6da1a5579

Co-authored-by: daihua2 <126872871+daihua2@users.noreply.github.com>
---
 .../src/components/head/MRT_TableHeadCell.tsx          |  2 +-
 .../material-react-table/src/hooks/useMRT_Effects.ts   | 10 +++++-----
 .../src/hooks/useMRT_TableOptions.ts                   |  6 +++---
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/packages/material-react-table/src/components/head/MRT_TableHeadCell.tsx b/packages/material-react-table/src/components/head/MRT_TableHeadCell.tsx
index 880826e83..2fa3959ba 100644
--- a/packages/material-react-table/src/components/head/MRT_TableHeadCell.tsx
+++ b/packages/material-react-table/src/components/head/MRT_TableHeadCell.tsx
@@ -326,7 +326,7 @@ export const MRT_TableHeadCell = <TData extends MRT_RowData>({
                       column={column}
                       table={table}
                       tableHeadCellRef={{
-                        current: tableHeadCellRefs.current?.[column.id]!,
+                        current: tableHeadCellRefs.current?.[column.id] ?? null,
                       }}
                     />
                   )}
diff --git a/packages/material-react-table/src/hooks/useMRT_Effects.ts b/packages/material-react-table/src/hooks/useMRT_Effects.ts
index ce4ace2cf..6b2579c46 100644
--- a/packages/material-react-table/src/hooks/useMRT_Effects.ts
+++ b/packages/material-react-table/src/hooks/useMRT_Effects.ts
@@ -97,10 +97,10 @@ export const useMRT_Effects = <TData extends MRT_RowData>(
 
   //fix pinned row top style when density changes
   useEffect(() => {
-    if (enableRowPinning && getIsSomeRowsPinned()) {
-      setTimeout(() => {
-        rerender();
-      }, 150);
-    }
+    if (!enableRowPinning || !getIsSomeRowsPinned()) return undefined;
+    const timeoutId = setTimeout(() => {
+      rerender();
+    }, 150);
+    return () => clearTimeout(timeoutId);
   }, [density]);
 };
diff --git a/packages/material-react-table/src/hooks/useMRT_TableOptions.ts b/packages/material-react-table/src/hooks/useMRT_TableOptions.ts
index 7bee63ec6..5802a02c9 100644
--- a/packages/material-react-table/src/hooks/useMRT_TableOptions.ts
+++ b/packages/material-react-table/src/hooks/useMRT_TableOptions.ts
@@ -127,10 +127,10 @@ export const useMRT_TableOptions: <TData extends MRT_RowData>(
   mrtTheme = useMemo(() => getMRTTheme(mrtTheme, theme), [mrtTheme, theme]);
   aggregationFns = useMemo(
     () => ({ ...MRT_AggregationFns, ...aggregationFns }),
-    [],
+    [aggregationFns],
   );
-  filterFns = useMemo(() => ({ ...MRT_FilterFns, ...filterFns }), []);
-  sortingFns = useMemo(() => ({ ...MRT_SortingFns, ...sortingFns }), []);
+  filterFns = useMemo(() => ({ ...MRT_FilterFns, ...filterFns }), [filterFns]);
+  sortingFns = useMemo(() => ({ ...MRT_SortingFns, ...sortingFns }), [sortingFns]);
   defaultColumn = useMemo(
     () => ({ ...MRT_DefaultColumn, ...defaultColumn }),
     [defaultColumn],