fix(console): lints trigger with non-async tasks

change existing lints to only trigger with tasks that are async; those
are all except those with kind 'blocking' and 'block_on'

this commit fixes issue tokio-rs#516

tokio-console/src/warnings.rs

@@ -148,6 +148,10 @@ impl Warn<Task> for SelfWakePercent {
     }
 
     fn check(&self, task: &Task) -> Warning {
+        // Don't fire warning for tasks that are not async
+        if task.kind() == "block_on" || task.kind() == "blocking" {
+            return Warning::Ok
+        }
         let self_wakes = task.self_wake_percent();
         if self_wakes > self.min_percent {
             Warning::Warn
@@ -174,6 +178,10 @@ impl Warn<Task> for LostWaker {
     }
 
     fn check(&self, task: &Task) -> Warning {
+        // Don't fire warning for tasks that are not async
+        if task.kind() == "block_on" || task.kind() == "blocking" {
+            return Warning::Ok
+        }
         if !task.is_completed()
             && task.waker_count() == 0
             && !task.is_running()
@@ -222,6 +230,10 @@ impl Warn<Task> for NeverYielded {
     }
 
     fn check(&self, task: &Task) -> Warning {
+        // Don't fire warning for tasks that are not async
+        if task.kind() == "block_on" || task.kind() == "blocking" {
+            return Warning::Ok
+        }
         // Don't fire warning for tasks that are waiting to run
         if task.state() != TaskState::Running {
             return Warning::Ok;