prefix: "exec: killing Cmd",
			err:    killErr,
		}
	}

	if c.goroutineErr != nil {
		select {
		case goroutineErr := <-c.goroutineErr:
			// Forward goroutineErr only if we don't have reason to believe it was
			// caused by a call to Cancel or Kill above.
			if err == nil && !killed {
				err = goroutineErr
			}
		default:
			// Close the child process's I/O pipes, in case it abandoned some