Add diagnostics to tasks (#4752)

substrate/primitives/consensus/common/Cargo.toml

@@ -14,6 +14,7 @@ sp-inherents = { version = "2.0.0", path = "../../inherents" }
 sp-state-machine = { version = "0.8.0", path = "../../../primitives/state-machine" }
 futures = { version = "0.3.1", features = ["thread-pool"] }
 futures-timer = "0.4.0"
+futures-diagnose = "1.0"
 sp-std = { version = "2.0.0", path = "../../std" }
 sp-version = { version = "2.0.0", path = "../../version" }
 sp-runtime = { version = "2.0.0", path = "../../runtime" }

substrate/primitives/consensus/common/src/import_queue/basic_queue.rs

@@ -71,7 +71,7 @@ impl<B: BlockT, Transaction: Send + 'static> BasicQueue<B, Transaction> {
 
 		let manual_poll;
 		if let Some(pool) = &mut pool {
-			pool.spawn_ok(future);
+			pool.spawn_ok(futures_diagnose::diagnose("import-queue", future));
 			manual_poll = None;
 		} else {
 			manual_poll = Some(Box::pin(future) as Pin<Box<_>>);