Expression evaluation failed in the debugger for web

This issue contains instructions on how to file bugs for incorrect expression evaluation.

If you are using flutter for web platform with an IDE (such as VSCode) and encounter an expression that fails to evaluate correctly, please:

- enable verbose logging for flutter
in VSCode, go to Settings | Extensions | Dart & Flutter | Dart: Flutter Additional args | add "-v"
- restart the debugger, stop at the same breakpoint
- run "capture logs" in command palette
- evaluate the same expression
- press cancel
- create a new issue on https://github.com/dart-lang/webdev, or add a comment to this issue with the logs generated. Please review the logs for any private information before attaching.

Start with the issue's listed VS Code and Flutter logging steps; no source file or test is identified. Done means capturing logs for the failed expression evaluation, reviewing them for private information, and filing or appending the report as instructed.

Written by the indexing model from the issue text.