Memory exception when actor returns a vector of results#1330

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magersjc asked this question inQ&A

magersjc

Apr 26, 2022

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magersjc
Apr 26, 2022

I am currently testing with CAF 0.18.6 and I ran into a strange issue when an actor tries to return a vector of results.
I took the delegating.cpp example in the examples/message_passing folder and changed it as follows:

#include "caf/all.hpp"using namespace caf;CAF_BEGIN_TYPE_ID_BLOCK(caf_custom_types, first_custom_type_id)//CAF_ADD_TYPE_ID(caf_custom_types, (std::vector<int32_t>))//CAF_END_TYPE_ID_BLOCK(caf_custom_types)// --(rst-delegate-begin)--using adder_actor = typed_actor<result<std::vector<int32_t>>(add_atom, int32_t, int32_t)>;adder_actor::behavior_type worker_impl() {   return {     [](add_atom, int32_t x, int32_t y) { std::vector<int32_t> result{}; result.push_back(x + y);  return result; },   };}adder_actor::behavior_type server_impl(adder_actor::pointer self,   adder_actor worker) {   return {     [=](add_atom add, int32_t x, int32_t y) {       return self->delegate(worker, add, x, y);     },   };}void client_impl(event_based_actor* self, adder_actor adder, int32_t x,   int32_t y) {   using namespace std::literals::chrono_literals;   self->request(adder, 10s, add_atom_v, x, y).then([=](std::vector<int32_t> result) {      aout(self) << x << " + " << y << " = " << result[0] << std::endl;      });}void caf_main(actor_system& sys) {   auto worker = sys.spawn(worker_impl);   auto server = sys.spawn(server_impl, sys.spawn(worker_impl));   sys.spawn(client_impl, server, 1, 2);}// --(rst-delegate-end)--CAF_MAIN()

When I run this code I get the following exception :