From 0b75c0c53d7708e42af5b72adb58f2261f7d9fe1 Mon Sep 17 00:00:00 2001
From: matthieugras <35115728+matthieugras@users.noreply.github.com>
Date: Mon, 15 Jul 2019 17:56:20 +0200
Subject: [PATCH] executor: block thread when needed in block fn (#1303)

Fix #1296
---
 tokio-executor/src/enter.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tokio-executor/src/enter.rs b/tokio-executor/src/enter.rs
index d09994c65..c10675fce 100644
--- a/tokio-executor/src/enter.rs
+++ b/tokio-executor/src/enter.rs
@@ -70,7 +70,7 @@ impl Enter {
         use std::task::Context;
         use std::task::Poll::Ready;
 
-        let park = ParkThread::new();
+        let mut park = ParkThread::new();
         let waker = park.unpark().into_waker();
         let mut cx = Context::from_waker(&waker);
 
@@ -82,6 +82,7 @@ impl Enter {
             if let Ready(v) = f.as_mut().poll(&mut cx) {
                 return v;
             }
+            park.park().unwrap();
         }
     }
 }