diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 6f7a401c7..e92ae7c08 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -87,10 +87,14 @@ namespace
     RPCTracker(const char *rpc, tools::LoggingPerformanceTimer &timer): rpc(rpc), timer(timer) {
     }
     ~RPCTracker() {
-      boost::unique_lock<boost::mutex> lock(mutex);
-      auto &e = tracker[rpc];
-      ++e.count;
-      e.time += timer.value();
+      try
+      {
+        boost::unique_lock<boost::mutex> lock(mutex);
+        auto &e = tracker[rpc];
+        ++e.count;
+        e.time += timer.value();
+      }
+      catch (...) { /* ignore */ }
     }
     void pay(uint64_t amount) {
       boost::unique_lock<boost::mutex> lock(mutex);
@@ -2229,8 +2233,7 @@ namespace cryptonote
   //------------------------------------------------------------------------------------------------------------------------------
   bool core_rpc_server::on_get_info_json(const COMMAND_RPC_GET_INFO::request& req, COMMAND_RPC_GET_INFO::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
   {
-    on_get_info(req, res, ctx);
-    if (res.status != CORE_RPC_STATUS_OK)
+    if (!on_get_info(req, res, ctx) || res.status != CORE_RPC_STATUS_OK)
     {
       error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
       error_resp.message = res.status;
@@ -2624,6 +2627,7 @@ namespace cryptonote
   {
     RPC_TRACKER(update);
 
+    res.update = false;
     if (m_core.offline())
     {
       res.status = "Daemon is running offline";
diff --git a/src/rpc/rpc_payment.cpp b/src/rpc/rpc_payment.cpp
index 0637db728..b363c27b2 100644
--- a/src/rpc/rpc_payment.cpp
+++ b/src/rpc/rpc_payment.cpp
@@ -59,6 +59,10 @@
 namespace cryptonote
 {
   rpc_payment::client_info::client_info():
+    previous_seed_height(0),
+    seed_height(0),
+    previous_seed_hash(crypto::null_hash),
+    seed_hash(crypto::null_hash),
     cookie(0),
     top(crypto::null_hash),
     previous_top(crypto::null_hash),
diff --git a/src/wallet/node_rpc_proxy.cpp b/src/wallet/node_rpc_proxy.cpp
index 005b0bafa..f3698b599 100644
--- a/src/wallet/node_rpc_proxy.cpp
+++ b/src/wallet/node_rpc_proxy.cpp
@@ -78,6 +78,10 @@ void NodeRPCProxy::invalidate()
   m_rpc_payment_seed_hash = crypto::null_hash;
   m_rpc_payment_next_seed_hash = crypto::null_hash;
   m_height_time = 0;
+  m_rpc_payment_diff = 0;
+  m_rpc_payment_credits_per_hash_found = 0;
+  m_rpc_payment_height = 0;
+  m_rpc_payment_cookie = 0;
 }
 
 boost::optional<std::string> NodeRPCProxy::get_rpc_version(uint32_t &rpc_version)
diff --git a/tests/functional_tests/make_test_signature.cc b/tests/functional_tests/make_test_signature.cc
index 8c0333233..789523de5 100644
--- a/tests/functional_tests/make_test_signature.cc
+++ b/tests/functional_tests/make_test_signature.cc
@@ -32,6 +32,7 @@
 
 int main(int argc, const char **argv)
 {
+  TRY_ENTRY();
   if (argc > 2)
   {
     fprintf(stderr, "usage: %s <secret_key>\n", argv[0]);
@@ -57,4 +58,5 @@ int main(int argc, const char **argv)
   std::string signature = cryptonote::make_rpc_payment_signature(skey);
   printf("%s\n", signature.c_str());
   return 0;
+  CATCH_ENTRY_L0("main()", 1);
 }