flutter · fluttergithubbot · Sep 25, 2020 · fluttergithubbot · Sep 25, 2020 · LongCatIsLooong
diff --git a/packages/flutter/lib/src/services/text_formatter.dart b/packages/flutter/lib/src/services/text_formatter.dart
-    // limit or the old value is composing too.
-    if (newValue.composing.isValid) {
-      if (maxLength != null && maxLength! > 0 &&
-          oldValue.text.characters.length == maxLength! &&
 expect(state.currentTextEditingValue.composing, const TextRange(start: 2, end: 4)); 
diff --git a/packages/flutter/lib/src/services/text_formatter.dart b/packages/flutter/lib/src/services/text_formatter.dart
@@ -319,8 +319,8 @@ class LengthLimitingTextInputFormatter extends TextInputFormatter {
  /// The limit on the number of characters (i.e. Unicode scalar values) this formatter
  /// will allow.
  ///
-  /// The value must be null or greater than zero. If it is null, then no limit
-  /// is enforced.
+  /// The value must be null or greater than zero. If it is null or -1, then no
diff --git a/packages/flutter/test/widgets/editable_text_test.dart b/packages/flutter/test/widgets/editable_text_test.dart
+
+    // The text should not change when trying to insert when the text is already
+    // at maxLength.
+    state.updateEditingValue(const TextEditingValue(text: '123456', composing: TextRange(start: 5, end: 6)));