int00(b&0x0F) << shift     if b < 0x00 {      break     }    }    intStringLen := int(stringLen)    if intStringLen < 0 {     return ErrInvalidLengthGenerated    }    postIndex := iNdEx + intStringLen    if postIndex < 0 {     return ErrInvalidLengthGenerated    }    if postIndex > l {     return io.ErrUnexpectedEOF    }    