Function nstd::io::nstd_io_write_line_err

#[no_mangle]
pub unsafe extern "C" fn nstd_io_write_line_err(
    str: *const c_char
) -> c_int

Writes str to stderr with an additional newline. Parameters: const char *const str - String to write to stderr. Returns: int errc - Nonzero on error.