fix(executor): select! panic

i never experienced this in development, but due to [tokio's select fairness](https://docs.rs/tokio/latest/tokio/macro.select.html\#fairness) a random branch will be started with initially
and since both of our branches select on Some, there's no else fallback

scyllax-cli/Cargo.toml

@@ -27,6 +27,7 @@ scylla.workspace = true
 scyllax = { version = "0.1.9-alpha.3", path = "../scyllax" }
 serde_json = "1.0.107"
 serde = { version = "1.0.188", features = ["derive"] }
+tracing-subscriber.workspace = true
 glob = "0.3.1"
 tracing.workspace = true
 filetime = "0.2.22"

scyllax-cli/src/bin/scyllax.rs

@@ -2,10 +2,15 @@
 use clap::Parser;
 use console::style;
 use scyllax_cli::Opt;
+use tracing_subscriber::prelude::*;
 
 /// runs the cli
 #[tokio::main]
 async fn main() {
+    tracing_subscriber::registry()
+        .with(tracing_subscriber::EnvFilter::from_default_env())
+        .with(tracing_subscriber::fmt::layer())
+        .init();
     // no special handling here
     if let Err(error) = scyllax_cli::run(Opt::parse()).await {
         println!("{} {}", style("error:").bold().red(), error);

scyllax/src/executor.rs

@@ -143,7 +143,7 @@ impl<T: QueryCollection + Clone> Executor<T> {
                                 Ok(_) => (),
                                 Err(e) => {
                                     let x = TrySendError::from(e);
-                                    tracing::error!("error sending query to query runner: {:?}", x);
+                                    tracing::error!(hash = hash, "error sending query to query runner: {:?}", x);
                                 },
                             };
                         });
@@ -153,7 +153,7 @@ impl<T: QueryCollection + Clone> Executor<T> {
                                 Ok(result) => result,
                                 Err(e) => Err(ScyllaxError::ReceiverError(e)),
                             };
-                            tracing::debug!("joinset handle returned: {:#?}", res);
+                            tracing::debug!(hash = hash, "joinset handle returned: {:#?}", res);
 
                             (hash, res)
                         });
@@ -168,7 +168,8 @@ impl<T: QueryCollection + Clone> Executor<T> {
                             }
                         }
                     }
-                }
+                },
+                else => {}
             }
         }
     }