From 972d4f8672bcca79e8aec3e7e2cf29632333b9a2 Mon Sep 17 00:00:00 2001
From: Jeff Becker <jeff@i2p.rocks>
Date: Fri, 26 Jul 2019 08:10:04 -0400
Subject: [PATCH] fix crash of clients and propagate lookup failures

---
 llarp/router/router.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/llarp/router/router.cpp b/llarp/router/router.cpp
index 5e951ff5e..8de55866c 100644
--- a/llarp/router/router.cpp
+++ b/llarp/router/router.cpp
@@ -728,10 +728,13 @@ namespace llarp
         [=](const RouterID &id, const RouterContact *const rc,
             const RCRequestResult result) {
           (void)id;
-          std::vector< RouterContact > routers;
-          if(result == RCRequestResult::Success && rc != nullptr)
+          if(resultHandler)
           {
-            routers.push_back(*rc);
+            std::vector< RouterContact > routers;
+            if(result == RCRequestResult::Success && rc != nullptr)
+            {
+              routers.push_back(*rc);
+            }
             resultHandler(routers);
           }
         });