Flutter引用父目录资源构建报错，求外部文件夹无冲突引用方案

尝试的资源配置 #

我尝试在Flutter的资源配置中引用外部图片文件夹：

assets:
    - ../backend/uploaded_images/

构建错误信息 #

首次运行应用无报错，但再次运行时构建失败，抛出以下错误：

Target debug_android_application failed: FileSystemException: Cannot copy file to 'C:\Users\nuras\CS_Projects\miras\farmer_market\flutter\build\app\intermediates\flutter\debug\flutter_assets\../backend/uploaded_images/13afcc89-36fb-4148-9a5c-1e47c6514bcf', path = 'C:\Users\nuras\CS_Projects\miras\farmer_market\flutter\..\backend\uploaded_images\13afcc89-36fb-4148-9a5c-1e47c6514bcf' (OS Error: The filename, directory name, or volume label syntax is incorrect., 
errno = 123)


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\Users\nuras\dev\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 5s
Running Gradle task 'assembleDebug'...                    

问题推测 #

• 路径解析时正斜杠与反斜杠的兼容性问题
• ../ 导致路径混乱：构建时路径跳出了flutter_assets目录，引发语法错误

求助需求 #

有没有办法无冲突地引用Flutter项目外部的文件夹？

已确认：移除yaml文件中的该资源配置后应用恢复正常，问题根源在该资源配置上。

内容的提问来源于stack exchange，提问作者Manu Gibst