DioxusLabs/dioxus · error
keyword argument repeated: `input`
Error message
keyword argument repeated: `input`
What it means
Parse guard in the server-macro attribute parser: the keyword argument `input` was passed more than once in the same macro attribute, but each keyword may be assigned only a single value. The input at fault is the duplicated `input = ...` entry in the macro invocation, flagged at the key's span.
Solutions
- Remove the duplicate `input` keyword argument; each keyword may only be specified once.
Defensive patterns
Strategy: validation
When it happens
Trigger: Thrown at packages/fullstack-macro/src/lib.rs:1596 when the library encounters an invalid state.
Common situations: See trigger scenarios.
AI-assisted analysis of DioxusLabs/dioxus@24f6a829df (2026-08-23).
Data as JSON: /api/errors/540d250427a3876f.
Report an issue: GitHub.
Appendix: source
Thrown at packages/fullstack-macro/src/lib.rs:1596
}
encoding = Some(stream.parse()?);
} else if key == "endpoint" {
if fn_path.is_some() {
return Err(syn::Error::new(
key.span(),
"keyword argument repeated: `endpoint`",
));
}
fn_path = Some(stream.parse()?);
} else if key == "input" {
if encoding.is_some() {
return Err(syn::Error::new(
key.span(),
"`encoding` and `input` should not both be \
specified",
));
} else if input.is_some() {
return Err(syn::Error::new(
key.span(),
"keyword argument repeated: `input`",
));
}
input = Some(stream.parse()?);
} else if key == "input_derive" {
if input_derive.is_some() {
return Err(syn::Error::new(
key.span(),
"keyword argument repeated: `input_derive`",
));
}
input_derive = Some(stream.parse()?);
} else if key == "output" {
if encoding.is_some() {
return Err(syn::Error::new(
key.span(),
"`encoding` and `output` should not both be \View on GitHub (pinned to 24f6a829df)