var i int
	r := bytes.NewReader(data)
	scanner := newScanner(r)
	for scanner.pos < atomic.LoadInt64(&scanner.end) {
		c := scanner.next()
		if scanner.readerErr != nil {
			t.Fatal(scanner.readerErr)
		}
		if c != data[i] {
			t.Fatalf("expected %s, got %s", string(data[i]), string(c))
		}
		t.Logf("pos=%d remaining=%d (%s)", i, r.Len(), string(c))
		i++
	}
}

	if len(context) > 0 {
		err.context = context[0]
	}
	err.atChar = d.cur()
	err.pos[0] = d.lineNo + 1
	err.pos[1] = int(d.pos - d.lineStart)
	err.readerErr = d.readerErr
	return err

	if err == nil {
		t.Fatalf("missing expected decoder error")
	}

	derr, ok := err.(DecoderError)
	if !ok {
		t.Fatalf("expected error of type DecoderError, got %T", err)
	}

	if derr.ReaderErr() == nil {
		t.Fatalf("missing expected underlying reader error")
	}
}

func TestDecoderMaxDepth(t *testing.T) {
	tests := []struct {
		input    string
		maxDepth int
		mustFail bool
	}{