From 4eb2d1d9f2f8eda594da83672d9dbac0a26c9520 Mon Sep 17 00:00:00 2001
From: Egor Korshun <120365747+EgorK0rshun@users.noreply.github.com>
Date: Fri, 8 Sep 2023 17:08:50 +0300
Subject: [PATCH] Fix #1392: UnhandledFlutterException: Null check operator
 used on a null value in Container.insert(container.dart:127) (#1393)

---
 CHANGELOG.md                                  |  3 +++
 lib/src/models/documents/nodes/container.dart | 16 ++++++++--------
 pubspec.yaml                                  |  2 +-
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43a6486d..19d7ce8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# [7.4.5]
+- Fix #1392.
+
 # [7.4.4]
 - Fix #1311.
 
diff --git a/lib/src/models/documents/nodes/container.dart b/lib/src/models/documents/nodes/container.dart
index 306d56bc..c8cd3a59 100644
--- a/lib/src/models/documents/nodes/container.dart
+++ b/lib/src/models/documents/nodes/container.dart
@@ -124,15 +124,15 @@ abstract class Container<T extends Node?> extends Node {
 
     if (isNotEmpty) {
       final child = queryChild(index, false);
-      child.node!.insert(child.offset, data, style);
-      return;
+      if (child.isNotEmpty) {
+        child.node!.insert(child.offset, data, style);
+      }
+    } else {
+      assert(index == 0);
+      final node = defaultChild;
+      add(node);
+      node?.insert(index, data, style);
     }
-
-    // empty
-    assert(index == 0);
-    final node = defaultChild;
-    add(node);
-    node?.insert(index, data, style);
   }
 
   @override
diff --git a/pubspec.yaml b/pubspec.yaml
index 4509d2d1..10a3e647 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_quill
 description: A rich text editor built for the modern Android, iOS, web and desktop platforms. It is the WYSIWYG editor and a Quill component for Flutter.
-version: 7.4.4
+version: 7.4.5
 homepage: https://1o24bbs.com/c/bulletjournal/108
 repository: https://github.com/singerdmx/flutter-quill