From bf0045d7a4cd4c7d4df3fa34b8a12795e8ee73aa Mon Sep 17 00:00:00 2001
From: Eli Zaretskii <eliz@gnu.org>
Date: Tue, 29 Aug 2017 18:13:44 +0300
Subject: [PATCH] Avoid aborting in 'waitpid' on MS-Windows

* src/w32proc.c (waitpid): Don't allow quitting if called with
WNOHANG in OPTIONS.  (Bug#28268)
---
 src/w32proc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/w32proc.c b/src/w32proc.c
index 76af55f9985..ffd5f0d0a1a 100644
--- a/src/w32proc.c
+++ b/src/w32proc.c
@@ -1449,7 +1449,11 @@ waitpid (pid_t pid, int *status, int options)
 
   do
     {
-      maybe_quit ();
+      /* When child_status_changed calls us with WNOHANG in OPTIONS,
+	 we are supposed to be non-interruptible, so don't allow
+	 quitting in that case.  */
+      if (!dont_wait)
+	maybe_quit ();
       active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms);
     } while (active == WAIT_TIMEOUT && !dont_wait);
 
-- 
2.11.4.GIT