{"record":{"id":"eb7ad4c3591e7da0","repo":"atuinsh/atuin","slug":"failed-to-deserialize-theme","errorCode":null,"errorMessage":"Failed to deserialize theme: {}","messagePattern":"Failed to deserialize theme: (.+?)","errorType":"validation","errorClass":"std::io::Error","httpStatus":null,"severity":"warning","filePath":"crates/atuin-client/src/theme.rs","lineNumber":459,"sourceCode":"            theme_file.to_str().unwrap(),\n            FileFormat::Toml,\n        ));\n\n        let config = config_builder.build()?;\n        self.load_theme_from_config(name, config, max_depth)\n    }\n\n    pub fn load_theme_from_config(\n        &mut self,\n        name: &str,\n        config: Config,\n        max_depth: u8,\n    ) -> Result<&Theme, Box<dyn error::Error>> {\n        let debug = self.debug;\n        let theme_config: ThemeConfig = match config.try_deserialize() {\n            Ok(tc) => tc,\n            Err(e) => {\n                return Err(Box::new(Error::new(\n                    ErrorKind::InvalidInput,\n                    format!(\n                        \"Failed to deserialize theme: {}\",\n                        if debug {\n                            e.to_string()\n                        } else {\n                            \"set theme debug on for more info\".to_string()\n                        }\n                    ),\n                )));\n            }\n        };\n        let colors: HashMap<Meaning, String> = theme_config.colors;\n        let parent: Option<&Theme> = match theme_config.theme.parent {\n            Some(parent_name) => {\n                if max_depth == 0 {\n                    return Err(Box::new(Error::new(\n                        ErrorKind::InvalidInput,","sourceCodeStart":441,"sourceCodeEnd":477,"githubUrl":"https://github.com/atuinsh/atuin/blob/202f6ad98ee0da165c35cdb2afbc5b13d6ab81a1/crates/atuin-client/src/theme.rs#L441-L477","documentation":"Thrown by ThemeManager::load_theme_from_config when the config crate's try_deserialize() of the theme TOML into ThemeConfig fails. It is wrapped in io::ErrorKind::InvalidInput, and the underlying cause string is redacted to 'set theme debug on for more info' unless debug was enabled in ThemeManager::new (wired to the theme.debug setting in config, settings.rs:1532). Like error 0, ThemeManager::load_theme catches it and degrades to the '(none)' theme, so users see a warning log with the theme silently not applied.","triggerScenarios":"A {name}.toml in the themes directory whose [theme] or colors table does not match ThemeConfig: unknown color keys (not valid Meaning variants), non-string color values, a missing or wrongly-typed theme.name or theme.parent, or a file that built as a Config but fails typed deserialization. Also reachable via load_theme_from_config directly with a programmatically built Config.","commonSituations":"Hand-editing a theme TOML and typos like `colour` instead of color keys, `red = \"Meaning::AlertError\"` inverted key/value order, using a theme written for a newer/older Atuin with a changed schema, or trailing types like integers where color strings are expected. Users migrating custom themes between Atuin versions frequently hit this.","solutions":["Set theme.debug = true in config.toml to get the full deserialization error message in the warning","Fix the reported key/type in the theme TOML so it matches the ThemeConfig schema (colors as strings keyed by meaning, theme.name/theme.parent as strings)","Copy a working theme (e.g. the default theme file from the Atuin repo) and modify it incrementally","Rename or remove the broken {name}.toml so the fallback to built-in themes is explicit"],"exampleFix":"# before (themes/mytheme.toml)\n[theme]\nname = \"mytheme\"\n[colors]\nerror = \"red\"        # unknown key 'error'\n\n# after\n[theme]\nname = \"mytheme\"\n[colors]\nAlertError = \"red\"   # valid Meaning key, string value","handlingStrategy":"validation","validationCode":"// Validate theme TOML against the schema before Atuin loads it\nlet raw = std::fs::read_to_string(theme_path)?;\nlet value: toml::Value = raw.parse()?;           // syntax check\nlet colors = value.get(\"colors\").and_then(|c| c.as_table());\nif colors.is_none() { /* schema mismatch: fix before shipping the theme */ }","typeGuard":"fn is_valid_theme_config(v: &toml::Value) -> bool {\n    v.get(\"theme\")\n        .and_then(|t| t.get(\"name\"))\n        .and_then(|n| n.as_str())\n        .is_some()\n        && v.get(\"colors\")\n            .and_then(|c| c.as_table())\n            .is_some_and(|t| t.values().all(|v| v.as_str().is_some()))\n}","tryCatchPattern":"match manager.load_theme_from_file(name, 10) {\n    Ok(t) => t,\n    Err(e) if e.to_string().contains(\"Failed to deserialize theme\") => {\n        // enable theme.debug for details, fall back to a builtin theme meanwhile\n        manager.load_theme(\"default\", None)\n    }\n    Err(e) => { /* propagate */ manager.load_theme(\"(none)\", None) }\n}","preventionTips":["Keep theme.debug = true in config while iterating on custom themes to see real deserialization errors","Start custom themes from a copy of a known-good theme file","Use string color values and valid meaning keys exactly as documented in ThemeConfig","Lint theme TOML in CI when themes live in a dotfiles repo"],"tags":["theme","toml","deserialization","config","rust","atuin"],"backgroundTag":"toml-deserialization-failed","analyzedSha":"202f6ad98ee0da165c35cdb2afbc5b13d6ab81a1","analyzedAt":"2026-08-16T19:30:24.731Z","schemaVersion":2},"datasetVersion":"2026-08-16T23:17:17.608Z"}