clockworklabs/SpacetimeDB · error

unable to decode args

Error message

unable to decode args

What it means

Error "unable to decode args" thrown in clockworklabs/SpacetimeDB.

Source

Thrown at crates/bindings/src/rt.rs:54

}

impl<T> IntoVec<T> for Option<T> {
    fn into_vec(self) -> Vec<T> {
        self.into_iter().collect()
    }
}

/// The `sender` invokes `reducer` at `timestamp` and provides it with the given `args`.
///
/// Returns an invalid buffer on success
/// and otherwise the error is written into the fresh one returned.
pub fn invoke_reducer<'a, A: Args<'a>>(
    reducer: impl Reducer<'a, A>,
    ctx: &ReducerContext,
    args: &'a [u8],
) -> Result<(), Box<str>> {
    // Deserialize the arguments from a bsatn encoding.
    let SerDeArgs(args) = bsatn::from_slice(args).expect("unable to decode args");

    reducer.invoke(ctx, args)
}

pub fn invoke_procedure<'a, A: Args<'a>, Ret: IntoProcedureResult>(
    procedure: impl Procedure<'a, A, Ret>,
    ctx: &mut ProcedureContext,
    args: &'a [u8],
) -> ProcedureResult {
    // Deserialize the arguments from a bsatn encoding.
    let SerDeArgs(args) = bsatn::from_slice(args).expect("unable to decode args");

    let res = procedure.invoke(ctx, args);

    res.to_result()
}

/// A trait for types representing the *execution logic* of a reducer.

View on GitHub (pinned to 524b4487d9)

When it happens

Trigger: Thrown at crates/bindings/src/rt.rs:54 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of clockworklabs/SpacetimeDB@524b4487d9 (2026-08-16). Data as JSON: /api/errors/90694fad77c37610. Report an issue: GitHub.