From 326034b41eec38d8b21c0479a1ec65ef23d669fb Mon Sep 17 00:00:00 2001
From: Leo <i@leo.moe>
Date: Wed, 18 Jan 2023 13:44:47 +0800
Subject: [PATCH] fix: panic on IPv6

---
 trace/icmp_ipv6.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/trace/icmp_ipv6.go b/trace/icmp_ipv6.go
index e1e1613..3e0ee2e 100644
--- a/trace/icmp_ipv6.go
+++ b/trace/icmp_ipv6.go
@@ -120,7 +120,9 @@ func (t *ICMPTracerv6) Execute() (*Result, error) {
 				Error:   ErrHopLimitTimeout,
 			})
 		}
-		t.RealtimePrinter(&t.res, t.MaxHops-1)
+		if t.RealtimePrinter != nil {
+			t.RealtimePrinter(&t.res, t.MaxHops-1)
+		}
 	}
 
 	return &t.res, nil