setHookOpenErr(func() error {
		// Wait for all connections to enqueue.
		opening.Wait()
		return errOffline
	})

	for i := 0; i < tryOpen; i++ {
		go func() {
			opening.Done() // signal one connection is in flight
			_, err := db.Exec("will never run")
			errs <- err
		}()
	}

	opening.Wait() // wait for all workers to begin running

	const timeout = 5 * time.Second

		if !yt.match(args) {
			// "xo" is always zero for VEX/EVEX encoded insts.
			z += int(yt.zoffset) + xo
		} else {
			if p.Scond != 0 && !evexZcase(yt.zcase) {
				// Do not signal error and continue to search
				// for matching EVEX-encoded form.
				z += int(yt.zoffset)
				continue
			}

			switch o.prefix {
			case Px1: // first option valid only in 32-bit mode

	reqerrc := make(chan error, 1)
	go func() {
		defer wg.Done()
		ctx := httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
			PutIdleConn: func(error) {
				// Signal that the idle conn has been returned to the pool,
				// and wait for the order to proceed.
				ch := make(chan struct{})
				putidlec <- ch
				close(putidlec) // panic if PutIdleConn runs twice for some reason