const char *file_name,
const char *function_name,
unsigned int line_number) :
- runtime_error(std::string(error_get_str(error_code)), file_name, function_name, line_number)
+ runtime_error(std::string(error_get_str(error_code)), file_name, function_name, line_number),
+ _error_code{error_code}
{
}