1 files changed, 6 insertions, 5 deletions
diff --git a/cli/ops/worker_host.rs b/cli/ops/worker_host.rs
index ad3752ffa..0ed700431 100644
--- a/cli/ops/worker_host.rs
+++ b/cli/ops/worker_host.rs
@@ -174,7 +174,7 @@ struct CreateWorkerArgs {
 fn op_create_worker(
   state: &State,
   args: Value,
-  _data: Option<ZeroCopyBuf>,
+  _data: &mut [ZeroCopyBuf],
 ) -> Result<JsonOp, OpError> {
   let args: CreateWorkerArgs = serde_json::from_value(args)?;
 
@@ -230,7 +230,7 @@ struct WorkerArgs {
 fn op_host_terminate_worker(
   state: &State,
   args: Value,
-  _data: Option<ZeroCopyBuf>,
+  _data: &mut [ZeroCopyBuf],
 ) -> Result<JsonOp, OpError> {
   let args: WorkerArgs = serde_json::from_value(args)?;
   let id = args.id as u32;
@@ -296,7 +296,7 @@ fn serialize_worker_event(event: WorkerEvent) -> Value {
 fn op_host_get_message(
   state: &State,
   args: Value,
-  _data: Option<ZeroCopyBuf>,
+  _data: &mut [ZeroCopyBuf],
 ) -> Result<JsonOp, OpError> {
   let args: WorkerArgs = serde_json::from_value(args)?;
   let id = args.id as u32;
@@ -345,11 +345,12 @@ fn op_host_get_message(
 fn op_host_post_message(
   state: &State,
   args: Value,
-  data: Option<ZeroCopyBuf>,
+  data: &mut [ZeroCopyBuf],
 ) -> Result<JsonOp, OpError> {
+  assert_eq!(data.len(), 1, "Invalid number of arguments");
   let args: WorkerArgs = serde_json::from_value(args)?;
   let id = args.id as u32;
-  let msg = Vec::from(data.unwrap().as_ref()).into_boxed_slice();
+  let msg = Vec::from(&*data[0]).into_boxed_slice();
 
   debug!("post message to worker {}", id);
   let state = state.borrow();