From 84c4a6d89fe4988e630e18d592908d12bdd017cb Mon Sep 17 00:00:00 2001
From: Blas Rodriguez Irizar <rodrigblas@gmail.com>
Date: Thu, 12 Aug 2021 15:37:26 +0200
Subject: [PATCH] task: quickly send task to heap on debug mode (#4009)

---
 tokio/src/task/spawn.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tokio/src/task/spawn.rs b/tokio/src/task/spawn.rs
index 3c577b82d..065d38f54 100644
--- a/tokio/src/task/spawn.rs
+++ b/tokio/src/task/spawn.rs
@@ -127,7 +127,13 @@ cfg_rt! {
         T: Future + Send + 'static,
         T::Output: Send + 'static,
     {
-        spawn_inner(future, None)
+        // preventing stack overflows on debug mode, by quickly sending the
+        // task to the heap.
+        if cfg!(debug_assertions) && std::mem::size_of::<T>() > 2048 {
+            spawn_inner(Box::pin(future), None)
+        } else {
+            spawn_inner(future, None)
+        }
     }
 
     #[cfg_attr(tokio_track_caller, track_caller)]