RangeError（长度）：无效值：只有有效值是 0：1. 抛出错误 'ErrorDescription' 的实例答案

【问题标题】：RangeError (length): Invalid value: Only valid value is 0: 1. Error thrown Instance of 'ErrorDescription'RangeError（长度）：无效值：只有有效值是 0：1. 抛出错误 'ErrorDescription' 的实例
【发布时间】：2021-02-24 12:58:31
【问题描述】：

我们刚刚发布了我们的应用程序。并且在生产中看到了这些崩溃。但是堆栈跟踪并没有把我带到有用的地方。

RangeError (length): Invalid value: Only valid value is 0: 1. Error throwed Instance of 'ErrorDescription

Non-fatal Exception: FlutterError
0  ???                            0x0 first (dart:core)
1  ???                            0x0 assembleSemanticsNode + 436 (paragraph.dart:436)
2  ???                            0x0 compileChildren + 3717 (object.dart:3717)
3  ???                            0x0 compileChildren + 3709 (object.dart:3709)
4  ???                            0x0 compileChildren + 3709 (object.dart:3709)
5  ???                            0x0 compileChildren + 3709 (object.dart:3709)
6  ???                            0x0 compileChildren + 3709 (object.dart:3709)
7  ???                            0x0 compileChildren + 3709 (object.dart:3709)
8  ???                            0x0 compileChildren + 3709 (object.dart:3709)
9  ???                            0x0 compileChildren + 3709 (object.dart:3709)
10 ???                            0x0 compileChildren + 3663 (object.dart:3663)
11 ???                            0x0 compileChildren + 3709 (object.dart:3709)
12 ???                            0x0 compileChildren + 3587 (object.dart:3587)
13 ???                            0x0 _updateSemantics + 2631 (object.dart:2631)
14 ???                            0x0 flushSemantics + 1081 (object.dart:1081)
15 ???                            0x0 drawFrame + 441 (binding.dart:441)
16 ???                            0x0 drawFrame + 914 (binding.dart:914)
17 ???                            0x0 _handlePersistentFrameCallback + 302 (binding.dart:302)
18 ???                            0x0 _invokeFrameCallback + 1117 (binding.dart:1117)
19 ???                            0x0 handleDrawFrame + 1055 (binding.dart:1055)
20 ???                            0x0 _handleDrawFrame + 971 (binding.dart:971)

复制步骤

我无法重现该问题。我在 firebase 中看到了这些崩溃。

日志

No problems with the analyzer

[✓] Flutter (Channel stable, 1.22.6, on Mac OS X 10.15.7 19H114 darwin-x64, locale en-BE)
    • Flutter version 1.22.6 at /Users/vanlooverenkoen/fvm/versions/stable
    • Framework revision 9b2d32b605 (5 weeks ago), 2021-01-22 14:36:39 -0800
    • Engine revision 2f0af37152
    • Dart version 2.10.5
                                                                                                                                                                                                                                                                                                                             [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at /Users/vanlooverenkoen/Library/Android/sdk
    • Platform android-30, build-tools 30.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 12.0.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.0.1, Build version 12A7300
    • CocoaPods version 1.10.0

[!] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

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【问题讨论】：

我认为，您应该分享导致错误的代码，以便我们可以更好地帮助您。
这就是问题，我不知道这个错误是从哪里引起的。我在 firebase 生产中遇到了这个错误。
也许在 ListView 之类的。您必须提供长度参数作为输入。
我在想也许它与空的空文本有关？因为paragraph.dart 文件。但我在那里也找不到任何东西
好吧，您可以做的不是共享整个代码，而是注释部分代码并测试您的应用程序。这样，您也可以找到导致 Widget 的错误。然后，您可以在这里分享，以便我们确定原因。

标签： flutter dart crashlytics

【解决方案1】：

在我们的例子中，我们有一个带有可点击文本跨度的富文本。

这导致了一个问题。

https://github.com/flutter/flutter/issues/69787 https://github.com/flutter/flutter/issues/51936

更新到 Flutter 2.0.0 以进行潜在修复

flutter 2.0.0 之前的解决方法：

ExcludeSemantics(
  excluding: true,
  child: RichText( ... ),
),

【讨论】：