Beginner troubles or curl_easy_perform -> segfault

Question

C++ / C#

Prehistory: I don't have average knowledge in C either. By the will of fate, it so happened that I had to write a simple file loader in C. There are suspicions that I did not read the cUrl documentation correctly, but took an example from their documentation.

CURL *curl;
curl = curl_easy_init();
if(!curl) {
            fprintf(stderr, "curl init() failed: ");
            return token;
}
// используется библиотека cJSON для чтения конфига
const char * password = cJSON_GetObjectItem(service,"password")->valuestring;
const char * login = cJSON_GetObjectItem(service,"login")->valuestring;
const char * url = cJSON_GetObjectItem(service,"url")->valuestring;
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_HEADER, "Content-Type: text/xml; charset=UTF-8");
// тут генерируется xml, читается файл с xml шаблоном запроса, логина и пароля заменяются в нужных местах
const char * xml = generate_xml(login, password);

curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, xml);
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE , strlen(xml));
// хотелось бы конечно писать результат, но для начала хоть запрос бы выполнить
//curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
//curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
CURLcode res;
res = curl_easy_perform(curl);

printf("break!\n");
exit(0);

those. to "break!" does not reach. crashes with a Segmentation fault and well, at least some info, but no, keep the segfalt and think about what you did wrong.

Answer 1

the problem was that the url was https, and without specifying the path to CURLOPT_CAINFO and setting CURLOPT_SSL_VERIFYHOST = 0, curl crashed with segfault

Answer 2

to "break!" does not reach. crashes with a Segmentation fault and well, at least some info

Build the program with debug information and run it in gdb.