升级到Flutter 1.7.8 + hotfix.3时无法编译

Question

将Flutter版本升级到1.7.8 + hotfix.3时，我收到一些错误消息。

这是消息：

Compiler message:
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/svg.dart:158:18: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
        context: 'picture failed to precache',
                 ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_provider.dart:335:20: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
          context: 'while resolving a picture',
                   ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_provider.dart:337:33: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
          informationCollector: (StringBuffer information) {
                                ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_provider.dart:432:31: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
        informationCollector: (StringBuffer information) {
                              ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_provider.dart:495:31: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
        informationCollector: (StringBuffer information) {
                              ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_provider.dart:559:31: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
        informationCollector: (StringBuffer information) {
                              ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_stream.dart:256:16: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
      context: context,
               ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/picture_stream.dart:301:18: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
        context: 'resolving a single-frame picture stream',
                 ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/svg/parser_state.dart:399:35: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
            informationCollector: (StringBuffer buff) {
                                  ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/svg/parser_state.dart:408:22: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
            context: 'in _Element.clipPath',
                     ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/svg/parser_state.dart:798:31: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
        informationCollector: (StringBuffer buff) {
                              ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/svg/parser_state.dart:809:18: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
        context: 'in parseSvgElement',
                 ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/utilities/errors.dart:8:32: Error: The argument type 'String' can't be assigned to the parameter type 'DiagnosticsNode'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'DiagnosticsNode'.
      context: 'in $methodName',
                               ^
file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.12.4+1/lib/src/utilities/errors.dart:10:29: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///C:/src/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
      informationCollector: (StringBuffer buff) {
                            ^
FAILURE: Build failed with an exception.
* Where:
Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 665
* What went wrong:
Execution failed for task ':app:compileflutterBuildDebugX86'.
> Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 41s
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

这是我的Flutter Doctor信息：

flutter doctor

医生摘要（要查看所有详细信息，请运行flutter doctor -v）：[？] Flutter（通道稳定，v1.7.8 + hotfix.3，在Microsoft Windows上[版本10.0.17134.885]）[！] Android工具链-为Android开发设备（Android SDK版本28.0.3）！不接受某些Android许可证。要解决此问题，请运行：flutter doctor --android-licenses
[？] Android Studio（3.2版）[！] IntelliJ IDEA社区版（2018.2版）X Flutter插件未安装；这增加了Flutter的特定功能。X Dart插件未安装；这增加了Dart特定的功能。[？] VS代码（1.36.1版）
[？]已连接的设备（1个可用）

！医生发现了2类问题。

Answer 1

将您的版本更新flutter_svg到至少 0.13.0pubspec.yml