fix(subscriber): fix build on tokio 1.21.0 (#374)

Due to a change in the unstable task builder APIs, this no longer
compiles with the latest version of Tokio. Fortunately, it's a simple
fix.

console-subscriber/Cargo.toml

@@ -54,7 +54,7 @@ serde_json = "1"
 crossbeam-channel = "0.5"
 
 [dev-dependencies]
-tokio = { version = "^1.7", features = ["full", "rt-multi-thread"] }
+tokio = { version = "^1.21", features = ["full", "rt-multi-thread"] }
 futures = "0.3"
 
 [package.metadata.docs.rs]

console-subscriber/examples/app.rs

@@ -23,15 +23,20 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
             "blocks" => {
                 tokio::task::Builder::new()
                     .name("blocks")
-                    .spawn(double_sleepy(1, 10));
+                    .spawn(double_sleepy(1, 10))
+                    .unwrap();
             }
             "coma" => {
                 tokio::task::Builder::new()
                     .name("coma")
-                    .spawn(std::future::pending::<()>());
+                    .spawn(std::future::pending::<()>())
+                    .unwrap();
             }
             "burn" => {
-                tokio::task::Builder::new().name("burn").spawn(burn(1, 10));
+                tokio::task::Builder::new()
+                    .name("burn")
+                    .spawn(burn(1, 10))
+                    .unwrap();
             }
             "help" | "-h" => {
                 eprintln!("{}", HELP);
@@ -47,10 +52,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
 
     let task1 = tokio::task::Builder::new()
         .name("task1")
-        .spawn(spawn_tasks(1, 10));
+        .spawn(spawn_tasks(1, 10))
+        .unwrap();
     let task2 = tokio::task::Builder::new()
         .name("task2")
-        .spawn(spawn_tasks(10, 30));
+        .spawn(spawn_tasks(10, 30))
+        .unwrap();
 
     let result = tokio::try_join! {
         task1,
@@ -66,7 +73,10 @@ async fn spawn_tasks(min: u64, max: u64) {
     loop {
         for i in min..max {
             tracing::trace!(i, "spawning wait task");
-            tokio::task::Builder::new().name("wait").spawn(wait(i));
+            tokio::task::Builder::new()
+                .name("wait")
+                .spawn(wait(i))
+                .unwrap();
 
             let sleep = Duration::from_secs(max) - Duration::from_secs(i);
             tracing::trace!(?sleep, "sleeping...");

console-subscriber/examples/barrier.rs

@@ -14,10 +14,15 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
             for i in 0..30 {
                 let c = barrier.clone();
                 let task_name = format!("task-{}", i);
-                handles.push(task::Builder::default().name(&task_name).spawn(async move {
-                    tokio::time::sleep(Duration::from_secs(i)).await;
-                    c.wait().await
-                }));
+                handles.push(
+                    task::Builder::default()
+                        .name(&task_name)
+                        .spawn(async move {
+                            tokio::time::sleep(Duration::from_secs(i)).await;
+                            c.wait().await
+                        })
+                        .unwrap(),
+                );
             }
 
             // Will not resolve until all "after wait" messages have been printed
@@ -33,6 +38,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
             // Exactly one barrier will resolve as the "leader"
             assert_eq!(num_leaders, 1);
         })
+        .unwrap()
         .await?;
 
     Ok(())

console-subscriber/examples/mutex.rs

@@ -20,11 +20,13 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
                             *lock += 1;
                             tokio::time::sleep(Duration::from_secs(1)).await;
                         }
-                    });
+                    })
+                    .unwrap();
             }
 
             while *count.lock().await < 50 {}
         })
+        .unwrap()
         .await?;
 
     Ok(())

console-subscriber/examples/rwlock.rs

@@ -20,7 +20,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
                             *lock += 1;
                             tokio::time::sleep(Duration::from_secs(1)).await;
                         }
-                    });
+                    })
+                    .unwrap();
             }
 
             loop {
@@ -31,6 +32,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
                 }
             }
         })
+        .unwrap()
         .await?;
 
     Ok(())

console-subscriber/examples/semaphore.rs

@@ -21,19 +21,24 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
                         .spawn(async move {
                             let _permit = acquire_sem.acquire_many(i).await.unwrap();
                             tokio::time::sleep(Duration::from_secs(i as u64 * 2)).await;
-                        }),
+                        })
+                        .unwrap(),
+                );
+                tasks.push(
+                    tokio::task::Builder::default()
+                        .name(&add_task_name)
+                        .spawn(async move {
+                            tokio::time::sleep(Duration::from_secs(i as u64 * 5)).await;
+                            add_sem.add_permits(i as usize);
+                        })
+                        .unwrap(),
                 );
-                tasks.push(tokio::task::Builder::default().name(&add_task_name).spawn(
-                    async move {
-                        tokio::time::sleep(Duration::from_secs(i as u64 * 5)).await;
-                        add_sem.add_permits(i as usize);
-                    },
-                ));
             }
 
             let all_tasks = futures::future::try_join_all(tasks);
             all_tasks.await.unwrap();
         })
+        .unwrap()
         .await?;
 
     Ok(())

console-subscriber/src/lib.rs

@@ -1063,7 +1063,7 @@ where
     T: Send + 'static,
 {
     #[cfg(tokio_unstable)]
-    return tokio::task::Builder::new().name(_name).spawn(task);
+    return tokio::task::Builder::new().name(_name).spawn(task).unwrap();
 
     #[cfg(not(tokio_unstable))]
     tokio::spawn(task)