Derived cookie Path aborts cookie jar loading in curl 8.23.0

I am reporting a related cookie-jar failure that I reproduced on the official curl 8.23.0 release.

else if(path) {
  /* No path was given in the header line, set the default */
  const char *endslash = strrchr(path, '/');
  if(endslash)
    plen = endslash - path + 1; /* include end slash */
  else
    plen = strlen(path);
}

if(path) {
  co->path = sanitize_cookie_path(path, plen);