r := strings.NewReader("0123456789")
	tests := []struct {
		off     int64
		seek    int
		n       int
		want    string
		wantpos int64
		readerr error
		seekerr string
	}{
		{seek: io.SeekStart, off: 0, n: 20, want: "0123456789"},
		{seek: io.SeekStart, off: 1, n: 1, want: "1"},
		{seek: io.SeekCurrent, off: 1, wantpos: 3, n: 2, want: "34"},
		{seek: io.SeekStart, off: -1, seekerr: "strings.Reader.Seek: negative position"},

	return 0
}

func makeBuf(d *Data, format dataFormat, name string, off Offset, data []byte) buf {
	return buf{d, d.order, format, name, off, data, nil}
}

func (b *buf) uint8() uint8 {
	if len(b.data) < 1 {
		b.error("underflow")
		return 0
	}
	val := b.data[0]
	b.data = b.data[1:]
	b.off++
	return val
}

func (b *buf) bytes(n int) []byte {
	if n < 0 || len(b.data) < n {

			sname := ctxt.loader.SymName(symIdx)
			if off := armap[sname]; off != 0 && !loaded[off] {
				load = append(load, off)
				loaded[off] = true
				if ctxt.Debugvlog > 1 {
					ctxt.Logf("hostArchive(%s): selecting object at offset %x to resolve %s [%d] reference from %s [%d]\n", name, off, sname, symIdx, ctxt.loader.SymName(froms[k]), froms[k])
				}
			}
		}

		for _, off := range load {
			l := nextar(f, int64(off), &arhdr)

stdout '^(set )?GOWORK=''?'$GOPATH'[\\/]src[\\/]go.work''?$'

cd ..
go env GOWORK
! stdout .
go env
stdout 'GOWORK=("")?'

cd src
go env GOWORK
stdout 'go.work'

env GOWORK='off'
go env GOWORK
stdout 'off'

! go env -w GOWORK=off
stderr '^go: GOWORK cannot be modified$'

-- go.work --
go 1.18

use a
-- a/go.mod --

//	[ ------- s string ---- ] { N: s, Type: string, Off: 0 }
//
//	s was not decomposed, but the SSA operates on its parts individually, so
//	there is a LocalSlot for each of its fields that points into the single stack slot.
//	[ ------- s string ---- ] { N: s, Type: *uint8, Off: 0 }, {N: s, Type: int, Off: 8}
//
//	s was decomposed. Each of its fields is in its own stack slot and has its own LocalSLot.

        @Override
        public void off(Ansi ansi) {
            ansi.fg(DEFAULT);
        }
    }

    private static class AttributeColor implements Color {
        private final Ansi.Attribute on;
        private final Ansi.Attribute off;

        public AttributeColor(Attribute on, Attribute off) {
            this.on = on;
            this.off = off;
        }

        @Override

  protected void update(byte[] b) {
    update(b, 0, b.length);
  }

  /** Updates this hasher with {@code len} bytes starting at {@code off} in the given buffer. */
  protected void update(byte[] b, int off, int len) {
    for (int i = off; i < off + len; i++) {
      update(b[i]);
    }
  }

  /** Updates this hasher with bytes from the given buffer. */
  protected void update(ByteBuffer b) {

	}
	off := int64(coverage.CovMetaHeaderSize)

	// Write function offsets section
	off = b.emitFuncOffsets(w, off)

	// Check for any errors up to this point.
	if b.werr != nil {
		return digest, b.werr
	}

	// Write string table.
	if err := b.stab.Write(w); err != nil {
		return digest, err
	}
	off += int64(b.stab.Size())

	// Write functions

)

func zeroRange(pp *objw.Progs, p *obj.Prog, off, cnt int64, _ *uint32) *obj.Prog {
	if cnt == 0 {
		return p
	}

	// Adjust the frame to account for LR.
	off += base.Ctxt.Arch.FixedFrameSize

	if cnt < int64(4*types.PtrSize) {
		for i := int64(0); i < cnt; i += int64(types.PtrSize) {
			p = pp.Append(p, riscv.AMOV, obj.TYPE_REG, riscv.REG_ZERO, 0, obj.TYPE_MEM, riscv.REG_SP, off+i)
		}
		return p
	}

	switch str {
	case "1", "t", "T", "true", "TRUE", "True", "on", "ON", "On":
		return true, nil
	case "0", "f", "F", "false", "FALSE", "False", "off", "OFF", "Off":
		return false, nil
	}
	if strings.EqualFold(str, "enabled") {
		return true, nil
	}
	if strings.EqualFold(str, "disabled") {
		return false, nil
	}
	return false, fmt.Errorf("ParseBool: parsing '%s': %w", str, strconv.ErrSyntax)
}