Hmbown/CodeWhale · error · anyhow::Error

Failed to update setting: invalid max history '{value}'. Exp

Error message

Failed to update setting: invalid max history '{value}'. Expected a positive number.

What it means

Validation failure parsing the max-history setting: the value string did not parse as a positive usize (empty, negative, non-numeric, or overflowing). The message is the generic sentinel for numeric settings whose parse::<usize>() failed in the set path.

Source

Thrown at crates/tui/src/settings.rs:1450

            }
            "session_auto_resume" | "auto_resume" => {
                self.session_auto_resume = parse_bool(value)?;
            }
            "cost_currency" | "currency" => {
                let Some(currency) = crate::pricing::CostCurrency::from_setting(value) else {
                    anyhow::bail!(
                        "Failed to update setting: invalid cost currency '{value}'. Expected: usd, cny, rmb, yuan."
                    );
                };
                self.cost_currency = match currency {
                    crate::pricing::CostCurrency::Usd => "usd",
                    crate::pricing::CostCurrency::Cny => "cny",
                }
                .to_string();
            }
            "max_history" | "history" => {
                let max: usize = value.parse().map_err(|_| {
                    anyhow::anyhow!(
                        "Failed to update setting: invalid max history '{value}'. Expected a positive number."
                    )
                })?;
                self.max_input_history = max;
            }
            "default_model" | "model" => {
                let trimmed = value.trim();
                if trimmed.is_empty()
                    || matches!(
                        trimmed.to_ascii_lowercase().as_str(),
                        "none" | "default" | "(default)"
                    )
                {
                    self.default_model = None;
                    return Ok(());
                }

                let Some(model) = normalize_default_model(trimmed) else {

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Supply a plain positive integer such as 10000
2. Remove units, commas, or quotes from the value
3. Use 0 only if the setting explicitly allows disabling history

When it happens

Trigger: Thrown at crates/tui/src/settings.rs:1450 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/4d841430392fdefe. Report an issue: GitHub.