Hmbown/CodeWhale · error · anyhow::Error

Failed to update setting: invalid {key} '{value}'. Expected

Error message

Failed to update setting: invalid {key} '{value}'. Expected 0 or a positive integer.

What it means

Generic parse_usize_setting failure: value.trim().parse::<usize>() returned Err for the named key — the input is not a bare non-negative integer. Used by numeric settings in Settings::set; the key in the message identifies which numeric setting failed to parse.

Source

Thrown at crates/tui/src/settings.rs:2574

        "on" | "true" | "yes" | "1" | "enabled" => Ok(true),
        "off" | "false" | "no" | "0" | "disabled" => Ok(false),
        _ => {
            anyhow::bail!("Failed to parse boolean '{value}': expected on/off, true/false, yes/no.")
        }
    }
}

fn default_thinking_preview_lines() -> usize {
    2
}

fn default_true() -> bool {
    true
}

fn parse_usize_setting(key: &str, value: &str) -> Result<usize> {
    value.trim().parse::<usize>().map_err(|_| {
        anyhow::anyhow!(
            "Failed to update setting: invalid {key} '{value}'. Expected 0 or a positive integer."
        )
    })
}

fn parse_u16_range(key: &str, value: &str, min: u16, max: u16) -> Result<u16> {
    let parsed = value
        .trim()
        .parse::<u16>()
        .map_err(|_| anyhow::anyhow!("Invalid {key} '{value}': expected {min}-{max}"))?;
    if !(min..=max).contains(&parsed) {
        anyhow::bail!("Invalid {key} '{value}': expected {min}-{max}");
    }
    Ok(parsed)
}

fn parse_percent_setting(key: &str, value: &str) -> Result<f64> {
    let trimmed = value.trim().trim_end_matches('%').trim();

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Enter a decimal non-negative integer with no sign, units, or separators
2. Very large values overflow usize — pick a smaller number
3. Re-check the setting's documented range before retrying

When it happens

Trigger: Thrown at crates/tui/src/settings.rs:2574 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/a19fadd2e91900b8. Report an issue: GitHub.