From 9f1888297340552211a7dc68ca4f6bbbd7af4325 Mon Sep 17 00:00:00 2001
From: David Cowden <dcow@smallstep.com>
Date: Mon, 11 May 2020 21:25:31 -0700
Subject: [PATCH] acme/challenge: Copy retry information on clone

When cloning a challenge, deeply clone the retry field if it is not nil.
---
 acme/challenge.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/acme/challenge.go b/acme/challenge.go
index e2e9b16d..bf398678 100644
--- a/acme/challenge.go
+++ b/acme/challenge.go
@@ -240,8 +240,10 @@ func (bc *baseChallenge) save(db nosql.DB, old challenge) error {
 
 func (bc *baseChallenge) clone() *baseChallenge {
 	u := *bc
-	r := *bc.Retry
-	u.Retry = &r
+	if bc.Retry != nil {
+		r := *bc.Retry
+		u.Retry = &r
+	}
 	return &u
 }