Valgrind detected a memory leak when the program exits

[nqf]

==11921== 80 (24 direct, 56 indirect) bytes in 1 blocks are definitely lost in loss record 3 of 3
==11921==    at 0x4C2B067: malloc (vg_replace_malloc.c:380)
==11921==    by 0x983D0D: ares_malloc_zero (in /home/fantasy-peak/build/service)
==11921==    by 0x9828F3: ares_getaddrinfo (in /home/fantasy-peak/build/service)
==11921==    by 0x615D1D: trantor::AresResolver::resolveInLoop(std::string const&, std::function<void (std::vector<trantor::InetAddress, std::allocator<trantor::InetAddress> > const&)> const&) (in /home/fantasy-peak/build/service)
==11921==    by 0x618CCF: trantor::AresResolver::resolve(std::string const&, std::function<void (trantor::InetAddress const&)> const&) (in /home/fantasy-peak/build/service)
==11921==    by 0x5559E6: drogon::HttpClientImpl::sendRequestInLoop(std::shared_ptr<drogon::HttpRequest> const&, std::function<void (drogon::ReqResult, std::shared_ptr<drogon::HttpResponse> const&)>&&) (in /home/fantasy-peak/build/service)
==11921==    by 0x556510: drogon::HttpClientImpl::sendRequestInLoop(std::shared_ptr<drogon::HttpRequest> const&, std::function<void (drogon::ReqResult, std::shared_ptr<drogon::HttpResponse> const&)>&&, double) (in /home/fantasy-peak/build/service)
==11921==    by 0x5EDF68: trantor::EventLoop::doRunInLoopFuncs() (in /home/fantasy-peak/build/service)
==11921==    by 0x5EEC99: trantor::EventLoop::loop() (in /home/fantasy-peak/build/service)
==11921==    by 0x5F0503: trantor::EventLoopThread::loopFuncs() (in /home/fantasy-peak/build/service)
==11921==    by 0x534AE02: execute_native_thread_routine (in /usr/lib64/libstdc++.so.6.0.31)
==11921==    by 0x4E42EA4: start_thread (in /usr/lib64/libpthread-2.17.so)
==11921== 
==11921== LEAK SUMMARY:
==11921==    definitely lost: 24 bytes in 1 blocks
==11921==    indirectly lost: 56 bytes in 2 blocks