if (alphanumSize < maxAlphanumTermSize) {
                                buf.appendCodePoint(c);
                                alphanumSize++;
                            }
                        } else {
                            buf.appendCodePoint(c);
                            alphanumSize++;
                        }
                        isSpace = false;

      sb.setLength(0);
      int utf8Length = 0;
      for (int i = 0; i < 6; i++) {
        Integer randomCodePoint = codePoints[rnd.nextInt(codePoints.length)];
        sb.appendCodePoint(randomCodePoint);
        utf8Length += utf8Lengths.get(randomCodePoint);
        if (utf8Length != Utf8.encodedLength(sb)) {
          StringBuilder repro = new StringBuilder();