From 3965f8821d718f3ef239769bd20e1b849209fd95 Mon Sep 17 00:00:00 2001
From: ghiscoding <gbeaulac@gmail.com>
Date: Thu, 22 Feb 2024 23:50:19 -0500
Subject: [PATCH] fix(core): add extra checks for some objects to be a bit more
 strict

---
 packages/common/src/core/slickGrid.ts             | 8 +++++---
 packages/common/src/services/extension.service.ts | 2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/packages/common/src/core/slickGrid.ts b/packages/common/src/core/slickGrid.ts
index 4a6f651fa..284972fbe 100644
--- a/packages/common/src/core/slickGrid.ts
+++ b/packages/common/src/core/slickGrid.ts
@@ -1584,7 +1584,9 @@ export class SlickGrid<TData = any, C extends Column<TData> = Column<TData>, O e
 
     for (let i = 0; i < this.columns.length; i++) {
       const m: C = this.columns[i];
-      if (m.hidden) { continue; }
+      if (!m || m.hidden) {
+        continue;
+      }
 
       const headerTarget = this.hasFrozenColumns() ? ((i <= this._options.frozenColumn!) ? this._headerL : this._headerR) : this._headerL;
       const headerRowTarget = this.hasFrozenColumns() ? ((i <= this._options.frozenColumn!) ? this._headerRowL : this._headerRowR) : this._headerRowL;
@@ -2892,7 +2894,7 @@ export class SlickGrid<TData = any, C extends Column<TData> = Column<TData>, O e
   protected updateColumnProps() {
     this.columnsById = {};
     for (let i = 0; i < this.columns.length; i++) {
-      let m: C = this.columns[i];
+      let m: C = this.columns[i] || {};
       if (m.width) {
         m.widthRequest = m.width;
       }
@@ -3999,7 +4001,7 @@ export class SlickGrid<TData = any, C extends Column<TData> = Column<TData>, O e
       }
 
       // Ignore alwaysRenderedColumns
-      if (Array.isArray(this.columns) && this.columns[i] && this.columns[i].alwaysRenderColumn) {
+      if (Array.isArray(this.columns) && this.columns[i]?.alwaysRenderColumn) {
         return;
       }
 
diff --git a/packages/common/src/services/extension.service.ts b/packages/common/src/services/extension.service.ts
index 63c7d01bc..4c1a76ab2 100644
--- a/packages/common/src/services/extension.service.ts
+++ b/packages/common/src/services/extension.service.ts
@@ -102,7 +102,7 @@ export class ExtensionService {
     this._rowMoveManagerPlugin = null as any;
     this._rowSelectionModel = null as any;
     this._extensionCreatedList = null as any;
-    this._extensionList = null as any;
+    this._extensionList = {} as ExtensionList<any>;
   }
 
   /**