clockworklabs/SpacetimeDB · error

unable to serialize typespace

Error message

unable to serialize typespace

What it means

Error "unable to serialize typespace" thrown in clockworklabs/SpacetimeDB.

Source

Thrown at crates/bindings/src/rt.rs:988

/// as it is being changed by the schema proposal.
///
/// The `ModuleDef` is used to define tables, constraints, indexes, reducers, etc.
/// This affords the module the opportunity
/// to define and, to a limited extent, alter the schema at initialization time,
/// including when modules are updated (re-publishing).
/// After initialization, the module cannot alter the schema.
#[unsafe(no_mangle)]
extern "C" fn __describe_module__(description: BytesSink) {
    // Collect the `module`.
    let mut module = ModuleBuilder::default();
    for describer in &mut *DESCRIBERS.lock().unwrap() {
        describer(&mut module)
    }

    // Serialize the module to bsatn.
    let module_def = module.inner.finish();
    let module_def = RawModuleDef::V10(module_def);
    let bytes = bsatn::to_vec(&module_def).expect("unable to serialize typespace");

    // Write the sets of reducers, procedures and views.
    REDUCERS.set(module.reducers).ok().unwrap();
    PROCEDURES.set(module.procedures).ok().unwrap();
    #[cfg(feature = "unstable")]
    HTTP_HANDLERS.set(module.http_handlers).ok().unwrap();
    VIEWS.set(module.views).ok().unwrap();
    ANONYMOUS_VIEWS.set(module.views_anon).ok().unwrap();

    // Write the bsatn data into the sink.
    write_to_sink(description, &bytes);
}

// TODO(1.0): update `__call_reducer__` docs + for `BytesSink`.

/// Called by the host to execute a reducer
/// when the `sender` calls the reducer identified by `id` at `timestamp` with `args`.
///

View on GitHub (pinned to 524b4487d9)

When it happens

Trigger: Thrown at crates/bindings/src/rt.rs:988 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of clockworklabs/SpacetimeDB@524b4487d9 (2026-08-16). Data as JSON: /api/errors/93c30dff03e0e3c0. Report an issue: GitHub.