From a8fce3cbbc8c44c41222bc9cbf7910e502077e4c Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <stapelberg@google.com>
Date: Mon, 14 Sep 2020 22:10:09 +0200
Subject: [PATCH] diag: drain ping reply channel to avoid goroutine leak

---
 internal/diag/ping.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/internal/diag/ping.go b/internal/diag/ping.go
index 6ac31c7..fb0272b 100644
--- a/internal/diag/ping.go
+++ b/internal/diag/ping.go
@@ -278,6 +278,11 @@ func (d *ping6) Evaluate() (string, error) {
 			if localAddr[reply.Address.String()] {
 				continue
 			}
+			go func() {
+				for range replies {
+					// drain channel
+				}
+			}()
 			return formatRTT(reply.Duration) + " from " + reply.Address.String(), nil
 		}
 		return "", fmt.Errorf("no responses to %s within %v", addr, timeout)