rec: some error paths do no create thread 0 so don't join it

Signed-off-by: Otto Moerbeek <otto.moerbeek@open-xchange.com>

diff --git a/pdns/recursordist/rec-main.hh b/pdns/recursordist/rec-main.hh
index 49576ee7bb016a2d08f5784f3242b8e2ad2aae81..90f61f0849d37040304a865a6f20821d9ecb9dba 100644 (file)
--- a/pdns/recursordist/rec-main.hh
+++ b/pdns/recursordist/rec-main.hh
@@ -556,7 +556,9 @@ public:
 
   static void joinThread0()
   {
-    info(0).thread.join();
+    if (!s_threadInfos.empty()) {
+      info(0).thread.join();
+    }
   }
 
   static void resize(size_t size)