git-ecosystem/git-credential-manager · info · Trace2Exception

User cancelled dialog.

Error message

User cancelled dialog.

What it means

This error is thrown by the DefaultAccountCommand when the user closes the account-selection dialog without confirming a choice (WindowResult is false). The command cannot produce a 'use_default_account' result without user consent, so it aborts with a Trace2Exception for tracing purposes. It is an intentional cancellation signal, not a bug in the library.

Solutions

1. Treat the exception as user cancellation: catch it in the caller and exit gracefully without retrying
2. When running non-interactively, set GCM_INTERACTIVE=never or use the appropriate non-interactive configuration so the dialog is never shown
3. Complete the dialog and confirm a choice instead of closing it
4. Call the command with explicit arguments (e.g. supply the account selection) so the dialog can be skipped

Example fix

// before
var result = command.ExecuteAsync();
ProcessResult(result);
// after
try
{
    var result = command.ExecuteAsync();
    ProcessResult(result);
}
catch (Trace2Exception ex) when (ex.Message == "User cancelled dialog.")
{
    // user cancelled; exit with a cancellation code
    return ExitCode.Cancelled;
}

// Before invoking, detect non-interactive environments to avoid showing the dialog at all
bool interactive = Environment.UserInteractive &&
    Environment.GetEnvironmentVariable("GCM_INTERACTIVE") != "never";
if (!interactive)
{
    Console.Error.WriteLine("Skipping default-account dialog: running non-interactively.");
    return;
}

try
{
    await command.ExecuteAsync();
}
catch (Trace2Exception ex) when (ex.Message == "User cancelled dialog.")
{
    // treat as graceful cancellation, not failure
    return ExitCode.Cancelled;
}

When it happens

Trigger: Running the default-account UI command (e.g. 'git-credential-manager github' default-account flow) and the user presses Cancel, closes the window, or dismisses the dialog via Esc so viewModel.WindowResult stays false after ShowAsync.

Common situations: Developers scripting GCM in CI or automation encounter this when the dialog appears but no user is present to confirm; end users simply cancel the dialog; the window is closed by the OS or a timeout without submitting.

Related errors

• User cancelled dialog.
• User cancelled dialog.
• User cancelled dialog.
• User cancelled dialog.
• User cancelled dialog.

AI-assisted analysis of git-ecosystem/git-credential-manager@e8ce762cd0 (2026-09-11). Data as JSON: /api/errors/8c57b5f56c61801a. Report an issue: GitHub.

Appendix: source

Thrown at src/Core/UI/Commands/DefaultAccountCommand.cs:44

        this.SetHandler(ExecuteAsync, title, userName, noLogo);
    }

    private async Task<int> ExecuteAsync(string title, string userName, bool noLogo)
    {
        var viewModel = new DefaultAccountViewModel(Context.SessionManager)
        {
            Title = !string.IsNullOrWhiteSpace(title)
                ? title
                : "Git Credential Manager",
            UserName = userName,
            ShowProductHeader = !noLogo
        };

        await ShowAsync(viewModel, CancellationToken.None);

        if (!viewModel.WindowResult)
        {
            throw new Trace2Exception(Context.Trace2, "User cancelled dialog.");
        }

        WriteResult(
            new Dictionary<string, string>
            {
                ["use_default_account"] = viewModel.UseDefaultAccount ? "1" : "0"
            }
        );

        return 0;
    }

    protected abstract Task ShowAsync(DefaultAccountViewModel viewModel, CancellationToken ct);
}

View on GitHub (pinned to e8ce762cd0)