dynamic functions cannot be used in tables or as funcrefs

Error message

dynamic functions cannot be used in tables or as funcrefs

What it means

Error "dynamic functions cannot be used in tables or as funcrefs" thrown in wasmerio/wasmer.

Source

Thrown at lib/api/src/backend/sys/entities/function/mod.rs:648

        params: Vec<RawValue>,
    ) -> Result<Box<[Value]>, RuntimeError> {
        let trampoline = unsafe {
            self.handle
                .get(store.objects_mut().as_sys())
                .anyfunc
                .as_ptr()
                .as_ref()
                .call_trampoline
        };
        let mut results = vec![Value::null(); self.result_arity(store)];
        self.call_wasm_raw(store, trampoline, params, &mut results)?;
        Ok(results.into_boxed_slice())
    }

    pub(crate) fn vm_funcref(&self, store: &impl AsStoreRef) -> VMFuncRef {
        let vm_function = self.handle.get(store.as_store_ref().objects().as_sys());
        if vm_function.kind == VMFunctionKind::Dynamic {
            panic!("dynamic functions cannot be used in tables or as funcrefs");
        }
        VMFuncRef(vm_function.anyfunc.as_ptr())
    }

    pub(crate) unsafe fn from_vm_funcref(store: &mut impl AsStoreMut, funcref: VMFuncRef) -> Self {
        let signature = {
            let anyfunc = unsafe { funcref.0.as_ref() };
            store
                .as_store_mut()
                .engine()
                .as_sys()
                .lookup_signature(anyfunc.type_signature_hash)
                .expect("Signature not found in store")
        };
        let vm_function = VMFunction {
            anyfunc: MaybeInstanceOwned::Instance(funcref.0),
            signature,
            // All functions in tables are already Static (as dynamic functions

View on GitHub (pinned to 8c4b9ee9d3)

When it happens

Trigger: Thrown at lib/api/src/backend/sys/entities/function/mod.rs:648 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of wasmerio/wasmer@8c4b9ee9d3 (2026-09-01). Data as JSON: /api/errors/062d292a1b92c669. Report an issue: GitHub.