Assert that the directory server digest is given

This prevents a possible crash when memory is copied from a pointer to
NULL.

diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index 814551521eb4f11184f5927e09a0ce44abfe2699..5e7906475f97d32c4876abd5cfede84ae1a8674b 100644 (file)
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -4051,6 +4051,8 @@ dir_server_new(int is_authority,
   uint32_t a;
   char *hostname_ = NULL;
 
+  tor_assert(digest);
+
   if (weight < 0)
     return NULL;