Runtime error when executing a simple example (gcc 8.3)

I built a simple example with sanitizer (added the parameter -fsanitizer = address, undefined in CXX_FLAGS). OS Debian 10.2 (gcc 8.3).

#include #include <cpprest/http_client.h> #include <cpprest/filestream.h> #include <cpprest/uri.h> #include <cpprest/json.h> using namespace utility; using namespace web; using namespace web::http; using namespace web::http::client; using namespace concurrency::streams; int main() { // Create user data as JSON object and make POST request. auto postJson = pplx::create_task( { json::value jsonObject; jsonObject[U("first_name")] = json::value::string(U("atakan")); jsonObject[U("last_name")] = json::value::string(U("sarioglu")); return http_client(U("https://reqres.in")) .request(methods::POST, uri_builder(U("api")).append_path(U("users")).to_string(), jsonObject.serialize(), U("application/json")); }) // Get the response. .then([](http_response response) { // Check the status code. if (response.status_code() != 201) { throw std::runtime_error("Returned " + std::to_string(response.status_code())); } // Convert the response body to JSON object. return response.extract_json(); }) // Parse the user details. .then([](json::value jsonObject) { std::wcout << jsonObject[U("first_name")].as_string() << " " << jsonObject[U("last_name")].as_string() << " (" << jsonObject[U("id")].as_string() << ")" << std::endl; }); try { postJson.wait(); } catch (const std::exception &e) { printf("Error exception:%s\n", e.what()); } return 0; }

Error:

/usr/local/include/cpprest/astreambuf.h:891:65: runtime error: member call on address 0x6070000039e0 which does not point to an object of type 'basic_streambuf' 0x6070000039e0: note: object is of type 'Concurrency::streams::details::basic_container_buffer<std::__cxx11::basic_string<char, std::char_traits, std::allocator > >' 01 00 80 2a 28 69 a5 90 e2 55 00 00 e0 39 00 00 70 60 00 00 70 1b 00 00 30 60 00 00 00 00 00 00 ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'Concurrency::streams::details::basic_container_buffer<std::__cxx11::basic_string<char, std::char_traits, std::allocator > >' string: {"id":1,"jsonrpc":"2.0","result":"4.4.4"} ================================================================= ==3619==ERROR: LeakSanitizer: detected memory leaks Direct leak of 512 byte(s) in 2 object(s) allocated from: #0 0x7f7bc2719720 in __interceptor_realloc (/lib/x86_64-linux-gnu/libasan.so.5+0xe9720) #1 0x7f7bbb0bc292 (/lib/x86_64-linux-gnu/libstdc++.so.6+0x95292)

If without a sanitizer it is naturally not there. More precisely, it is, just no one tells you about it (such as sanitizer). Any thoughts on how to fix this?