zed-industries/zed · error · syn::Error

invalid argument name

Error message

invalid argument name

What it means

Returned while parsing #[gpui::test] macro arguments when a name-value or list meta uses an ident that matches none of the known options (retries, iterations, on_failure, seed, ...). The misspelled/unknown argument name is the fault; macro expansion is rejected.

Source

Thrown at crates/gpui_macros/src/test.rs:81

                        .value()
                        .split("::")
                        .map(|part| PathSegment::from(Ident::new(part, name.span())))
                        .collect();
                    let path = syn::Path {
                        leading_colon: None,
                        segments,
                    };
                    on_failure_fn_name = quote!(Some(#path));
                }
                (Meta::NameValue(meta), "seed") => {
                    seeds = vec![parse_usize_from_expr(&meta.value)? as u64]
                }
                (Meta::List(list), "seeds") => seeds = parse_u64_array(list)?,
                (Meta::Path(_), _) => {
                    return Err(syn::Error::new(meta.span(), "invalid path argument"));
                }
                (_, _) => {
                    return Err(syn::Error::new(meta.span(), "invalid argument name"));
                }
            }
        }

        Ok(Args {
            seeds,
            max_retries,
            max_iterations,
            on_failure_fn_name,
        })
    }
}

pub fn test(args: TokenStream, function: TokenStream) -> TokenStream {
    let args = syn::parse_macro_input!(args as Args);
    let mut inner_fn = match syn::parse::<ItemFn>(function) {
        Ok(f) => f,
        Err(err) => return error_to_stream(err),

View on GitHub (pinned to f4178619ac)

Solutions

1. Check the option spelling against supported names (retries, iterations, seed, seeds, on_failure)
2. Remove the unsupported option

When it happens

Trigger: Thrown at crates/gpui_macros/src/test.rs:81 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@f4178619ac (2026-08-20). Data as JSON: /api/errors/e1c3e2e436816d3b. Report an issue: GitHub.