From 0a970b2a19c9fe5166e846d8a0c8b4f4fa5f1b4f Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Mon, 30 Jul 2018 14:55:39 +0100
Subject: [PATCH] Fix crash parsing a --synth-domain with no prefix. Problem
 introduced in 2.79/6b2b564ac34cb3c862f168e6b1457f9f0b9ca69c

---
 src/option.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/option.c b/src/option.c
index b22fc90..4e54afb 100644
--- a/src/option.c
+++ b/src/option.c
@@ -2347,7 +2347,9 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 		      char *star;
 		      new->next = daemon->synth_domains;
 		      daemon->synth_domains = new;
-		      if ((star = strrchr(new->prefix, '*')) && *(star+1) == 0)
+		      if (new->prefix &&
+			  (star = strrchr(new->prefix, '*'))
+			  && *(star+1) == 0)
 			{
 			  *star = 0;
 			  new->indexed = 1;
-- 
2.41.0