_ sys.NotInHeap
	x uint8
}

// bytep returns a pointer to the n'th byte of b.
func (b *gcBits) bytep(n uintptr) *uint8 {
	return addb(&b.x, n)
}

// bitp returns a pointer to the byte containing bit n and a mask for
// selecting that bit from *bytep.
func (b *gcBits) bitp(n uintptr) (bytep *uint8, mask uint8) {
	return b.bytep(n / 8), 1 << (n % 8)
}

				// the runtime's accounting will be wrong.
				nbytes := int64(npages * pageSize)
				gcController.heapReleased.add(nbytes)
				gcController.heapFree.add(-nbytes)

				stats := memstats.heapStats.acquire()
				atomic.Xaddint64(&stats.committed, -nbytes)
				atomic.Xaddint64(&stats.released, nbytes)
				memstats.heapStats.release()
			}

	if n := len(eofR.buf); n != 0 {
		t.Fatalf("got %d bytes left in bufio.Reader source; want 0 bytes", n)
	}
	// To prove the point, check that there are still 5 bytes available to read.
	if n := r.Buffered(); n != 5 {
		t.Fatalf("got %d bytes buffered in bufio.Reader; want 5 bytes", n)
	}

	// This is the second read of 0 bytes.
	read, err = r.Read([]byte{})
	if err != nil {
		t.Fatalf("unexpected error: %v", err)

}

func commaOrPeriod(b byte) bool {
	return b == '.' || b == ','
}

func parseNanoseconds[bytes []byte | string](value bytes, nbytes int) (ns int, rangeErrString string, err error) {
	if !commaOrPeriod(value[0]) {
		err = errBad
		return
	}
	if nbytes > 10 {
		value = value[:10]
		nbytes = 10
	}
	if ns, err = atoi(value[1:nbytes]); err != nil {
		return
	}

}

func checkLehmerGcd(aBytes, bBytes []byte) bool {
	a := new(Int).SetBytes(aBytes)
	b := new(Int).SetBytes(bBytes)

	if a.Sign() <= 0 || b.Sign() <= 0 {
		return true // can only test positive arguments
	}

	d := new(Int).lehmerGCD(nil, nil, a, b)
	d0, _, _ := euclidExtGCD(a, b)

	return d.Cmp(d0) == 0
}

func checkLehmerExtGcd(aBytes, bBytes []byte) bool {
	a := new(Int).SetBytes(aBytes)

		// //line :1
		//        on_test *[0]byte
		// //line :1
		// }
		//
		// Which is not useful. Moreover we never override source info,
		// so subsequent source code uses the same source info.
		// Moreover, empty file name makes compile emit no source debug info at all.
		var buf bytes.Buffer
		noSourceConf.Fprint(&buf, fset, def.Go)
		if bytes.HasPrefix(buf.Bytes(), []byte("_Ctype_")) ||