DioxusLabs/dioxus · error · syn::Error

Could not find a field with the name '{}'

Error message

Could not find a field with the name '{}'

What it means

Error "Could not find a field with the name '{}'" thrown in DioxusLabs/dioxus.

Source

Thrown at packages/router-macro/src/hash.rs:56

        route_span: proc_macro2::Span,
        mut fields: impl Iterator<Item = (&'a Ident, &'a Type)>,
        hash: &str,
    ) -> syn::Result<Self> {
        // check if the route has a hash string
        let Some(hash) = hash.strip_prefix(':') else {
            return Err(syn::Error::new(
                route_span,
                "Failed to parse `:`. Hash fragments must be in the format '#:<field>'",
            ));
        };

        let hash_ident = Ident::new(hash, proc_macro2::Span::call_site());
        let field = fields.find(|(name, _)| *name == &hash_ident);

        let ty = if let Some((_, ty)) = field {
            ty.clone()
        } else {
            return Err(syn::Error::new(
                route_span,
                format!("Could not find a field with the name '{}'", hash_ident),
            ));
        };

        Ok(Self {
            ident: hash_ident,
            ty,
        })
    }
}

View on GitHub (pinned to 393d190a80)

When it happens

Trigger: Thrown at packages/router-macro/src/hash.rs:56 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@393d190a80 (2026-08-16). Data as JSON: /api/errors/54d86ed805706d5f. Report an issue: GitHub.