启动Flutter项目Xcode报错，报错信息如下
Launching lib/main.dart on iPhone 11 Pro in debug mode...
lib/main.dart:1
Xcode build done. 29.5s
Failed to build iOS app
Error output from Xcode build:
↳
** BUILD FAILED **
Xcode's output:
↳
../../../Development/flutter/packages/flutter/lib/src/painting/image_provider.dart:670:8: Error: Getter not found: 'overrethrow'.
@overrethrow;
^^^^^^^^^^^
../../../Development/flutter/packages/flutter/lib/src/painting/image_provider.dart:670:8: Error: This can't be used as metadata; metadata should be a reference to a compile-time constant variable, or a call to a constant constructor.
@overrethrow;
^
../../../Development/flutter/packages/flutter/lib/src/painting/image_provider.dart:670:19: Error: Expected an identifier, but got ';'.
Try inserting an identifier before ';'.
@overrethrow;
^
Command PhaseScriptExecution failed with a nonzero exit code
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Analyzing workspace
note: Constructing build description
note: Build preparation complete
/Users/zhangbing/Downloads/code/bizhi_app/ios/Pods/Pods.xcodeproj: warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.5.99. (in target 'Flutter' from project 'Pods')
Could not build the application for the simulator.
Error launching application on iPhone 11 Pro.
Exited (sigterm)
flutter版本: 2.0.4
编辑器：VS Code
尝试过 flutter clean 命令，没有解决。
stackoverflow.com上有个类似的问题：imageprovider-bug-flutter
