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-rw-r--r--src/or/dns.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/or/dns.c b/src/or/dns.c
index eca6905e82..c45caf09d4 100644
--- a/src/or/dns.c
+++ b/src/or/dns.c
@@ -157,6 +157,7 @@ evdns_log_cb(int warn, const char *msg)
if (!strcmpstart(msg, "Nameserver ") && (cp=strstr(msg, " has failed: "))) {
char *ns = tor_strndup(msg+11, cp-(msg+11));
const char *err = strchr(cp, ':'+2);
+ tor_assert(err);
/* Don't warn about a single failed nameserver; we'll warn with 'all
* nameservers have failed' if we're completely out of nameservers;
* otherwise, the situation is tolerable. */