rust-lang/cargo · error · anyhow::Error

{} target {}.name is required

Error message

{} target {}.name is required

What it means

Error "{} target {}.name is required" thrown in rust-lang/cargo.

Source

Thrown at src/workspace/parser/targets.rs:1190

    target: &TomlTarget,
    target_kind_human: &str,
    target_kind: &str,
    warnings: &mut Vec<String>,
) -> CargoResult<()> {
    match target.name {
        Some(ref name) => {
            if name.trim().is_empty() {
                anyhow::bail!("{} target names cannot be empty", target_kind_human)
            }
            if cfg!(windows) && restricted_names::is_windows_reserved(name) {
                warnings.push(format!(
                    "{} target `{}` is a reserved Windows filename, \
                        this target will not work on Windows platforms",
                    target_kind_human, name
                ));
            }
        }
        None => anyhow::bail!(
            "{} target {}.name is required",
            target_kind_human,
            target_kind
        ),
    }

    Ok(())
}

fn validate_bin_proc_macro(
    target: &TomlTarget,
    edition: Edition,
    warnings: &mut Vec<String>,
    errors: &mut Vec<String>,
) -> CargoResult<()> {
    if target.proc_macro() == Some(true) {
        let name = name_or_panic(target);
        errors.push(format!(

View on GitHub (pinned to 0e07a15537)

Solutions

1. Add a `name` field to the target definition in Cargo.toml.

When it happens

Trigger: Thrown at src/workspace/parser/targets.rs:1190 when the library encounters an invalid state.

Common situations: Occurs when a target table (e.g. `[[bin]]`, `[[test]]`) omits the required `name` key. Add `name = "..."` to the target definition.

AI-assisted analysis of rust-lang/cargo@0e07a15537 (2026-08-06). Data as JSON: /data/errors/f09ae8e64de87448.json. Report an issue: GitHub.