From 49559402cf23393709851a5f76b6e8add94c141f Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Sat, 18 Nov 2017 19:50:22 -0800
Subject: [PATCH] Add a virtual destructor for ThreadedQueue

---
 src/threaded_queue.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/threaded_queue.h b/src/threaded_queue.h
index 01505724..0a52b771 100644
--- a/src/threaded_queue.h
+++ b/src/threaded_queue.h
@@ -16,6 +16,7 @@ using std::experimental::optional;
 
 struct BaseThreadQueue {
   virtual bool IsEmpty() = 0;
+  virtual ~BaseThreadQueue() = default;
 };
 
 struct MultiQueueWaiter {