}
	}

	if goroutineErr := c.awaitGoroutines(timer); err == nil {
		// Report an error from the copying goroutines only if the program otherwise
		// exited normally on its own. Otherwise, the copying error may be due to the
		// abnormal termination.
		err = goroutineErr
	}
	closeDescriptors(c.parentIOPipes)
	c.parentIOPipes = nil

	return err
}