DioxusLabs/dioxus · error · syn::Error

keyword argument repeated: `impl_deref`

Error message

keyword argument repeated: `impl_deref`

What it means

Error "keyword argument repeated: `impl_deref`" thrown in DioxusLabs/dioxus.

Source

Thrown at packages/fullstack-macro/src/lib.rs:1658

                    } else if key == "custom" {
                        if custom_wrapper.is_some() {
                            return Err(syn::Error::new(
                                key.span(),
                                "keyword argument repeated: `custom`",
                            ));
                        }
                        custom_wrapper = Some(stream.parse()?);
                    } else if key == "impl_from" {
                        if impl_from.is_some() {
                            return Err(syn::Error::new(
                                key.span(),
                                "keyword argument repeated: `impl_from`",
                            ));
                        }
                        impl_from = Some(stream.parse()?);
                    } else if key == "impl_deref" {
                        if impl_deref.is_some() {
                            return Err(syn::Error::new(
                                key.span(),
                                "keyword argument repeated: `impl_deref`",
                            ));
                        }
                        impl_deref = Some(stream.parse()?);
                    } else if key == "protocol" {
                        if protocol.is_some() {
                            return Err(syn::Error::new(
                                key.span(),
                                "keyword argument repeated: `protocol`",
                            ));
                        }
                        protocol = Some(stream.parse()?);
                    } else {
                        return Err(lookahead.error());
                    }
                } else {
                    let value = key_or_value;

View on GitHub (pinned to 393d190a80)

When it happens

Trigger: Thrown at packages/fullstack-macro/src/lib.rs:1658 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/b4a8519a044a46ac. Report an issue: GitHub.