Program: 152743
Project: 152743
Buggy source:
private void paintText(Canvas canvas){
  List<SchoolClass> schoolClasses=lesson.getSchoolClasses();
  List<SchoolRoom> schoolRooms=lesson.getSchoolRooms();
  List<SchoolSubject> schoolSubjects=lesson.getSchoolSubjects();
  List<SchoolTeacher> schoolTeachers=lesson.getSchoolTeachers();
  TextPaint tp=new TextPaint();
  tp.setColor(Color.BLACK);
  tp.setAntiAlias(true);
  tp.setTextSize(30);
  StringBuilder classes=new StringBuilder();
  StringBuilder rooms=new StringBuilder();
  StringBuilder subjects=new StringBuilder();
  StringBuilder teacher=new StringBuilder();
  for (  SchoolClass s : schoolClasses) {
    classes.append(s.getName() + "String_Node_Str");
  }
  for (  SchoolRoom s : schoolRooms) {
    rooms.append(s.getName() + "String_Node_Str");
  }
  for (  SchoolSubject s : schoolSubjects) {
    subjects.append(s.getName() + "String_Node_Str");
  }
  for (  SchoolTeacher s : schoolTeachers) {
    teacher.append(s.getName() + "String_Node_Str");
  }
  if (lcode instanceof LessonCodeSubstitute) {
    LessonCodeSubstitute lcs=(LessonCodeSubstitute)lcode;
    SchoolRoom originSchoolRoom=lcs.getOriginSchoolRoom();
    SchoolTeacher originSchoolTeacher=lcs.getOriginSchoolTeacher();
    if (originSchoolRoom != null)     rooms.append("String_Node_Str" + originSchoolRoom.getName() + "String_Node_Str");
    if (originSchoolTeacher != null)     teacher.append("String_Node_Str" + originSchoolTeacher.getName() + "String_Node_Str");
  }
  StaticLayout sl=new StaticLayout(classes.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,40);
  sl.draw(canvas);
  sl=new StaticLayout(teacher.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,40);
  sl.draw(canvas);
  sl=new StaticLayout(subjects.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,40);
  sl.draw(canvas);
  sl=new StaticLayout(rooms.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,40);
  sl.draw(canvas);
}

Fixed version (ground truth):
private void paintText(Canvas canvas){
  List<SchoolClass> schoolClasses=lesson.getSchoolClasses();
  List<SchoolRoom> schoolRooms=lesson.getSchoolRooms();
  List<SchoolSubject> schoolSubjects=lesson.getSchoolSubjects();
  List<SchoolTeacher> schoolTeachers=lesson.getSchoolTeachers();
  TextPaint tp=new TextPaint();
  tp.setColor(Color.BLACK);
  tp.setAntiAlias(true);
  tp.setTextSize(30);
  StringBuilder classes=new StringBuilder();
  StringBuilder rooms=new StringBuilder();
  StringBuilder subjects=new StringBuilder();
  StringBuilder teacher=new StringBuilder();
  for (  SchoolClass s : schoolClasses) {
    classes.append(s.getName().trim() + "String_Node_Str");
  }
  for (  SchoolRoom s : schoolRooms) {
    rooms.append(s.getName().trim() + "String_Node_Str");
  }
  for (  SchoolSubject s : schoolSubjects) {
    subjects.append(s.getName().trim() + "String_Node_Str");
  }
  for (  SchoolTeacher s : schoolTeachers) {
    teacher.append(s.getName().trim() + "String_Node_Str");
  }
  if (lcode instanceof LessonCodeSubstitute) {
    LessonCodeSubstitute lcs=(LessonCodeSubstitute)lcode;
    SchoolRoom originSchoolRoom=lcs.getOriginSchoolRoom();
    SchoolTeacher originSchoolTeacher=lcs.getOriginSchoolTeacher();
    if (originSchoolRoom != null)     rooms.append("String_Node_Str" + originSchoolRoom.getName() + "String_Node_Str");
    if (originSchoolTeacher != null)     teacher.append("String_Node_Str" + originSchoolTeacher.getName() + "String_Node_Str");
  }
  ArrayList<String> splitString=splitString(classes.toString(),tp);
  StaticLayout sl=null;
  for (  String line : splitString) {
    canvas.translate(0,40);
    sl=new StaticLayout(line.trim(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
    sl.draw(canvas);
  }
  sl=new StaticLayout(teacher.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,50);
  sl.draw(canvas);
  sl=new StaticLayout(subjects.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,50);
  sl.draw(canvas);
  sl=new StaticLayout(rooms.toString(),tp,width,Layout.Alignment.ALIGN_CENTER,0,0,false);
  canvas.translate(0,50);
  sl.draw(canvas);
}