From 908d47305bc8aa7fb63725c3991dafe57e1da23d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Fri, 17 Jul 2020 01:46:59 +0200
Subject: [PATCH] fix race in runWorker

---
 sched.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sched.go b/sched.go
index 44e62f6c2..caf67c678 100644
--- a/sched.go
+++ b/sched.go
@@ -367,7 +367,10 @@ func (sh *scheduler) trySched() {
 
 func (sh *scheduler) runWorker(wid WorkerID) {
 	go func() {
+		sh.workersLk.Lock()
 		worker := sh.workers[wid]
+		sh.workersLk.Unlock()
+
 		scheduledWindows := make(chan *schedWindow, SchedWindows)
 		taskDone := make(chan struct{}, 1)
 		windowsRequested := 0