From 22a3b101714d8756f2d239ee3199b555d3396712 Mon Sep 17 00:00:00 2001
From: Jonathan Bastien-Filiatrault <jonathan@zerospam.ca>
Date: Thu, 19 Sep 2019 14:12:04 -0400
Subject: [PATCH] executor: fix blocking pool bug re: thread shutdown (#1562)

Currently, when threads in the blocking pool shutdown due to being idle
the counter tracking threads is not decremented. This prevents new threads
from being spawned to replace the shutdown threads.
---
 tokio-executor/src/blocking.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tokio-executor/src/blocking.rs b/tokio-executor/src/blocking.rs
index b24be56fa..424d46767 100644
--- a/tokio-executor/src/blocking.rs
+++ b/tokio-executor/src/blocking.rs
@@ -118,6 +118,8 @@ fn spawn_thread() {
                         run_task(task);
                         continue 'outer;
                     } else if timeout_result.timed_out() {
+                        shared.num_idle = shared.num_idle.saturating_sub(1);
+                        shared.num_th -= 1;
                         break 'outer;
                     }
                 }