clang -o bug bug.c -lcurl

bug.c

#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
#include <curl/curl.h>
#include <stdlib.h>

// Compiled and ran via 
// $ clang -o bug bug.c -lcurl && ./bug

void perform_https_req() {
  CURL* curl = curl_easy_init();
  curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
  curl_easy_setopt(curl, CURLOPT_URL, "https://google.com");
  curl_easy_setopt(curl, CURLOPT_NOBODY, 1);
  
  fprintf(stdout, "Performing the request\n");
  fflush(stdout);
  
  curl_easy_perform(curl);
  
  fprintf(stdout, "Request performed.\n");
  fflush(stdout);
  
  curl_easy_cleanup(curl);
}

int main(int argc, char*argv[]){
  
  // Perform a curl request to google in the master first. This is necessary to cause the crash,
  // at least in my attempts.
  perform_https_req();
  
  pid_t child_pid;
  child_pid = fork();
  if(child_pid == 0) {
    perform_https_req(); // Perform the request in child
    exit(0);
  } else {
    int stat_loc;
    wait(&stat_loc);
    printf("Exited with %d\n", stat_loc);
  }
  return 0;
}