b := pos.base
	for b != nil && b != b.pos.base {
		b = b.pos.base
	}
	// b == nil || b == b.pos.base
	return b
}

func (pos Pos) RelFilename() string { return pos.base.Filename() }

func (pos Pos) RelLine() uint {
	b := pos.base
	if b.Line() == 0 {
		// base line is unknown => relative line is unknown
		return 0
	}
	return b.Line() + (pos.Line() - b.Pos().Line())
}

func (pos Pos) RelCol() uint {

// etc).
func (ctxt *Link) getFileIndexAndLine(xpos src.XPos) (int, int32) {
	pos := ctxt.InnermostPos(xpos)
	if !pos.IsKnown() {
		pos = src.Pos{}
	}
	return pos.FileIndex(), int32(pos.RelLine())

// RelFilename returns the filename recorded with the position's base.
func (p Pos) RelFilename() string { return p.base.Filename() }

// RelLine returns the line number relative to the position's base.
func (p Pos) RelLine() uint {
	b := p.base
	if b.Line() == 0 {
		// base line is unknown => relative line is unknown
		return 0
	}
	return b.Line() + (p.Line() - b.Pos().Line())
}

	// TODO(mdempsky): Shouldn't we write out StartPos.FileIndex() too?
	putattr(ctxt, s.Absfn, abbrev, DW_FORM_udata, DW_CLS_CONSTANT, int64(s.StartPos.RelLine()), nil)

	var ev int64
	if s.External {
		ev = 1
	}
	putattr(ctxt, s.Absfn, abbrev, DW_FORM_flag, DW_CLS_FLAG, ev, 0)

	// Child variables (may be empty)
	var flattened []*Var

		}

		pos := perr.Pos
		if filename := pos.RelFilename(); filename != test.filename {
			t.Errorf("%s: got filename = %q; want %q", test.src, filename, test.filename)
		}
		if line := pos.RelLine(); line != test.line {
			t.Errorf("%s: got line = %d; want %d", test.src, line, test.line)
		}
		if col := pos.RelCol(); col != test.col {
			t.Errorf("%s: got col = %d; want %d", test.src, col, test.col)
		}
	}

	m := make(map[varPos]int)
	for i, n := range dcl {
		pos := base.Ctxt.InnermostPos(n.Pos())
		vp := varPos{
			DeclName: n.Sym().Name,
			DeclFile: pos.RelFilename(),
			DeclLine: pos.RelLine(),
			DeclCol:  pos.RelCol(),
		}
		if _, found := m[vp]; found {

	if ctxt.DebugInfo != nil {
		scopes, inlcalls = ctxt.DebugInfo(s, info, curfn)
	}
	var err error
	dwctxt := dwCtxt{ctxt}
	startPos := ctxt.InnermostPos(textPos(s))
	if !startPos.IsKnown() || startPos.RelLine() != uint(s.Func().StartLine) {
		panic("bad startPos")
	}
	fnstate := &dwarf.FnState{
		Name:          s.Name,
		Info:          info,
		Loc:           loc,
		Ranges:        ranges,

                            "d", (Collection<String>) ImmutableSortedSet.of("david", "dead")),
                        Helpers.mapEntry(
                            "e", (Collection<String>) ImmutableSortedSet.of("eric", "elaine")));
                  }

                  @SuppressWarnings("unchecked")
                  @Override
                  public Entry<String, Collection<String>>[] createArray(int length) {