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This pull request is created by [automatic cherry pick workflow](https://github.com/flutter/flutter/blob/main/docs/releases/Flutter-Cherrypick-Process.md#automatically-creates-a-cherry-pick-request) Please fill in the form below, and a flutter domain expert will evaluate this cherry pick request. ### Issue Link: What is the link to the issue this cherry-pick is addressing? Example issue: https://github.com/flutter/flutter/issues/81666 ### Changelog Description: Explain this cherry pick in one line that is accessible to most Flutter developers. See [best practices](https://github.com/flutter/flutter/blob/main/docs/releases/Hotfix-Documentation-Best-Practices.md) for examples Improve logging for UTF-8 decoding errors. ### Impact Description: What is the impact (ex. visual jank on Samsung phones, app crash, cannot ship an iOS app)? Does it impact development (ex. flutter doctor crashes when Android Studio is installed), or the shipping production app (the app crashes on launch) When an exception is thrown within a transformer provided to `Stream.transform(...)`, an asynchronous stack trace pointing to the internal transformation machinery is reported instead of where the call to `transform(...)` was made, making tracking down where these exceptions come from extremely difficult. ### Workaround: Is there a workaround for this issue? No. ### Risk: What is the risk level of this cherry-pick? ### Test Coverage: Are you confident that your fix is well-tested by automated tests? ### Validation Steps: What are the steps to validate that this fix works? Not a fix, just additional logging. Tests have been added to ensure this extension works as expected.