Program: 8637
Project: 8637
Buggy source:
@Override public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,@Nullable Bundle savedInstanceState){
  Utils.setActivityTitleAndSubtitle(getActivity(),getString(R.string.date_converter),"String_Node_Str");
  View view=inflater.inflate(R.layout.fragment_converter,container,false);
  AppCompatImageView iv=view.findViewById(R.id.calendars_card_icon);
  iv.setImageResource(R.drawable.ic_swap_vertical_circle);
  todayText=view.findViewById(R.id.today);
  todayIcon=view.findViewById(R.id.today_icon);
  todayText.setVisibility(View.GONE);
  todayIcon.setVisibility(View.GONE);
  todayText.setOnClickListener(this);
  todayIcon.setOnClickListener(this);
  calendarTypeSpinner=view.findViewById(R.id.calendarTypeSpinner);
  yearSpinner=view.findViewById(R.id.yearSpinner);
  monthSpinner=view.findViewById(R.id.monthSpinner);
  daySpinner=view.findViewById(R.id.daySpinner);
  weekDayName=view.findViewById(R.id.week_day_name);
  shamsiDateDay=view.findViewById(R.id.shamsi_date_day);
  shamsiDate=view.findViewById(R.id.shamsi_date);
  gregorianDateDay=view.findViewById(R.id.gregorian_date_day);
  gregorianDate=view.findViewById(R.id.gregorian_date);
  islamicDateDay=view.findViewById(R.id.islamic_date_day);
  islamicDate=view.findViewById(R.id.islamic_date);
  calendarsCard=view.findViewById(R.id.calendars_card);
  diffDate=view.findViewById(R.id.diff_date);
  calendarTypeSpinner.setAdapter(new ArrayAdapter<>(getContext(),android.R.layout.simple_spinner_dropdown_item,getResources().getStringArray(R.array.calendar_type)));
  calendarTypeSpinner.setSelection(0);
  startingYearOnYearSpinner=Utils.fillYearMonthDaySpinners(getContext(),calendarTypeSpinner,yearSpinner,monthSpinner,daySpinner);
  calendarTypeSpinner.setOnItemSelectedListener(this);
  yearSpinner.setOnItemSelectedListener(this);
  monthSpinner.setOnItemSelectedListener(this);
  daySpinner.setOnItemSelectedListener(this);
  return view;
}

Fixed version (ground truth):
@Override public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,@Nullable Bundle savedInstanceState){
  Utils.setActivityTitleAndSubtitle(getActivity(),getString(R.string.date_converter),"String_Node_Str");
  View view=inflater.inflate(R.layout.fragment_converter,container,false);
  AppCompatImageView iv=view.findViewById(R.id.calendars_card_icon);
  iv.setImageResource(R.drawable.ic_swap_vertical_circle);
  todayText=view.findViewById(R.id.today);
  todayIcon=view.findViewById(R.id.today_icon);
  todayText.setVisibility(View.GONE);
  todayIcon.setVisibility(View.GONE);
  todayText.setOnClickListener(this);
  todayIcon.setOnClickListener(this);
  calendarTypeSpinner=view.findViewById(R.id.calendarTypeSpinner);
  yearSpinner=view.findViewById(R.id.yearSpinner);
  monthSpinner=view.findViewById(R.id.monthSpinner);
  daySpinner=view.findViewById(R.id.daySpinner);
  weekDayName=view.findViewById(R.id.week_day_name);
  shamsiDateDay=view.findViewById(R.id.shamsi_date_day);
  shamsiDate=view.findViewById(R.id.shamsi_date);
  gregorianDateDay=view.findViewById(R.id.gregorian_date_day);
  gregorianDate=view.findViewById(R.id.gregorian_date);
  islamicDateDay=view.findViewById(R.id.islamic_date_day);
  islamicDate=view.findViewById(R.id.islamic_date);
  shamsiDateDay.setOnClickListener(this);
  shamsiDate.setOnClickListener(this);
  gregorianDateDay.setOnClickListener(this);
  gregorianDate.setOnClickListener(this);
  islamicDateDay.setOnClickListener(this);
  islamicDate.setOnClickListener(this);
  calendarsCard=view.findViewById(R.id.calendars_card);
  diffDate=view.findViewById(R.id.diff_date);
  calendarTypeSpinner.setAdapter(new ArrayAdapter<>(getContext(),android.R.layout.simple_spinner_dropdown_item,getResources().getStringArray(R.array.calendar_type)));
  calendarTypeSpinner.setSelection(0);
  startingYearOnYearSpinner=Utils.fillYearMonthDaySpinners(getContext(),calendarTypeSpinner,yearSpinner,monthSpinner,daySpinner);
  calendarTypeSpinner.setOnItemSelectedListener(this);
  yearSpinner.setOnItemSelectedListener(this);
  monthSpinner.setOnItemSelectedListener(this);
  daySpinner.setOnItemSelectedListener(this);
  return view;
}