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[tool] add warning when rendering backend selection flags are used with release builds #191027

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@gaaclarke

Flags like --no-enable-impeller are ignored in release builds which is intentional and can be confusing for users (#190910). We should print out a warning in the tool when users attempt to do this.

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  1. changed the title [-][tool] add warning when background selection flags are used with release builds[/-] [+][tool] add warning when rendering backend selection flags are used with release builds[/+] on Aug 12, 2026
  2. added a commit that references this issue on Aug 13, 2026
    99399b2
  3. github-actions commented on Aug 28, 2026

    @github-actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  4. locked as resolved and limited conversation to collaborators on Aug 28, 2026
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