swc-project/swc · error · TypeError

Assignment to constant variable.

Error message

Assignment to constant variable.

What it means

Error "Assignment to constant variable." thrown in swc-project/swc.

Source

Thrown at bindings/binding_nodejs_support_wasm/src/nodejs.rs:1148

        binding.namespace,
        export_property_access(&binding.export_name)
    )
}

fn export_property_access(export_name: &str) -> String {
    if is_identifier_name(export_name) {
        format!(".{export_name}")
    } else {
        format!("[{}]", json_string(export_name))
    }
}

fn import_meta_error_expression() -> String {
    "(() => { throw new SyntaxError(\"Cannot use import.meta outside a module\"); })()".to_string()
}

fn import_assignment_error_expression() -> String {
    "(() => { throw new TypeError(\"Assignment to constant variable.\"); })()".to_string()
}

fn is_identifier_name(value: &str) -> bool {
    let mut chars = value.chars();
    let Some(first) = chars.next() else {
        return false;
    };

    if !(first == '_' || first == '$' || first.is_ascii_alphabetic()) {
        return false;
    }

    chars.all(|ch| ch == '_' || ch == '$' || ch.is_ascii_alphanumeric())
}

enum ParseOutcome {
    Valid,
    Invalid(Vec<ParseError>),

View on GitHub (pinned to d7d7434666)

When it happens

Trigger: Thrown at bindings/binding_nodejs_support_wasm/src/nodejs.rs:1148 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of swc-project/swc@d7d7434666 (2026-08-16). Data as JSON: /api/errors/03e752ed4e124442. Report an issue: GitHub.