Fix dangling response listeners

Signed-off-by: trivernis <trivernis@protonmail.com>

src/ipc/mod.rs

@@ -62,6 +62,7 @@ async fn handle_connection<S: 'static + AsyncProtocolStream>(
 /// Handles a single event in a different tokio context
 fn handle_event(mut ctx: Context, handler: Arc<EventHandler>, event: Event) {
     ctx.set_ref_id(Some(event.id()));
+    let event_id = event.id();
 
     tokio::spawn(async move {
         match handler.handle_event(&ctx, event).await {
@@ -74,6 +75,8 @@ fn handle_event(mut ctx: Context, handler: Arc<EventHandler>, event: Event) {
                 {
                     tracing::error!("Error occurred when sending error response: {:?}", e);
                 }
+                let mut reply_listeners = ctx.reply_listeners.lock().await;
+                reply_listeners.remove(&event_id);
             }
             Err(e) => {
                 // emit an error event

src/ipc/stream_emitter/emit_metadata_with_response_stream.rs

@@ -20,6 +20,7 @@ pub struct EmitMetadataWithResponseStream<P: IntoPayload> {
     pub(crate) emit_metadata: Option<EmitMetadata<P>>,
 }
 
+/// An asynchronous stream one can read all responses to a specific event from.
 pub struct ResponseStream {
     event_id: u64,
     ctx: Option<Context>,