Need a way to catch DioException [request cancelled] from the caller code

[stanbav]

Package

dio

Version

5.3.3

Operating-System

Android, iOS, Web, MacOS, Linux, Windows

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[√] Flutter (Channel stable, 3.16.0, on Microsoft Windows [Version 10.0.19045.3803], locale en-US)
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    • Engine revision 74d16627b9
    • Dart version 3.2.0
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[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 33.0.2)
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    • Platform android-33, build-tools 33.0.2
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[√] Android Studio (version 2022.2)
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[√] Connected device (4 available)
    • SM G935F (mobile) • ad0516024000250aa3 • android-arm64  • Android 8.0.0 (API 26)
    • Windows (desktop) • windows            • windows-x64    • Microsoft Windows [Version 10.0.19045.3803]
    • Chrome (web)      • chrome             • web-javascript • Google Chrome 120.0.6099.200
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[√] Network resources
    • All expected network resources are available.

• No issues found!

Dart Version

3.2.0

Steps to Reproduce

Is there a way to catch the exception (DioException (DioException [request cancelled]: The request was cancelled.)) thrown from the checkCancelled‎ method ?
It seems to be impossible to do it by using the Dio package's public API and async/await keywords since the _dispatchRequest method is not being awaited for some reason 🤔 and the exception goes unhandled in this case.

Expected Result

Need a way to catch the DioException (DioException [request cancelled]: The request was cancelled.) exception.

Actual Result

The exception DioException (DioException [request cancelled]: The request was cancelled.) goes unhandled if the request is being cancelled using the CancelToken.

[AlexV525]

Duplicate of #1869

[stanbav]

@AlexV525, according to the Dart SDK collaborator, there is no issue in the Dart SDK dart-lang/sdk#47985 (comment)
If a Future with an error is not awaited - try/catch will not be able to catch it. As I stated in my first post - the Future returned by the catchError method is not awaited, and therefore, there is no way to catch the error by wrapping the fetch method in the try/catch section.
So I believe that shows that something should be done in the Dio package, don't you agree?

[AlexV525]

So I believe that shows that something should be done in the Dio package, don't you agree?

Not really. If you uncheck the debugger setting with "uncaught exception" then it'll be caught normally. No matter you enabled that feature or not it can be caught eventually.