dnslookup: Fix crash when log_noise() is turned on

diff --git a/src/dnslookup.c b/src/dnslookup.c
index 76e3acfa9da2c43f969d3269e67d09c84daecb54..a550ca61d4223778ecd3ff1406a8053602345b63 100644 (file)
--- a/src/dnslookup.c
+++ b/src/dnslookup.c
@@ -335,7 +335,7 @@ loop:
 
        /* launch callback */
        log_noise("dns: deliver_info(%s) addr=%s", req->name,
-                 sa2str(ai->ai_addr, sabuf, sizeof(sabuf)));
+                 ai ? sa2str(ai->ai_addr, sabuf, sizeof(sabuf)) : "NULL");
        ucb->cb_func(ucb->cb_arg,
                     ai ? ai->ai_addr : NULL,
                     ai ? ai->ai_addrlen : 0);