From 7c1e70902b6cdddfffb61904ad043f648a2f1be9 Mon Sep 17 00:00:00 2001
From: Jeremy Evans <code@jeremyevans.net>
Date: Thu, 17 Oct 2019 11:47:24 -0700
Subject: [PATCH] Set report_on_exception = false in join_nowait thread

Otherwise, duplicate exception reports can happen.

Fixes Ruby Bug 15644
---
 lib/thwait.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/thwait.rb b/lib/thwait.rb
index 541fe1e..fe33eb2 100644
--- a/lib/thwait.rb
+++ b/lib/thwait.rb
@@ -89,6 +89,7 @@ def join_nowait(*threads)
     @threads.concat threads
     for th in threads
       Thread.start(th) do |t|
+        Thread.current.report_on_exception = false
         begin
           t.join
         ensure