Program: 80870
Project: 80870
Buggy source:
public IConfigTabListProvider parse(TabListConfig config){
  List<SlotTemplate> playerLines=config.playerLines.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList());
  List<SlotTemplate> morePlayerLines=config.morePlayersLines.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList());
  List<Function<TabListContext,List<Section>>> topSectionProviders=new ArrayList<>();
  List<Function<TabListContext,List<Section>>> botSectionProviders=new ArrayList<>();
  final boolean[] bottom={false};
  for (  String line : config.tabList) {
    if (line == null)     continue;
    final int[] startColumn={-1};
    final int[] column={-1};
    final int[] minslots={0};
    final int[] maxplayers={1000};
    final List<String> sortrules=new ArrayList<>();
    line=findTag(line,PATTERN_ALIGN_BOTTOM,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        bottom[0]=true;
      }
    }
);
    line=findTag(line,PATTERN_ALIGN_LEFT,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        startColumn[0]=0;
      }
    }
);
    line=findTag(line,PATTERN_ALIGN_RIGHT,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        startColumn[0]=columns - 1;
      }
    }
);
    line=findTag(line,PATTERN_COLUMN,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        column[0]=Integer.parseInt(matcher.group(1));
        if (column[0] >= columns) {
          plugin.getLogger().warning(String.format("String_Node_Str",column[0],columns,columns - 1));
          column[0]=columns - 1;
        }
      }
    }
);
    line=findTag(line,PATTERN_ROW,matcher -> {
      if (!config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        column[0]=Integer.parseInt(matcher.group(1));
        if (column[0] >= rows) {
          plugin.getLogger().warning(String.format("String_Node_Str",column[0],rows,rows - 1));
          column[0]=rows - 1;
        }
      }
    }
);
    line=findTag(line,PATTERN_SORT,matcher -> {
      sortrules.addAll(Arrays.asList(matcher.group(1).split("String_Node_Str")));
    }
);
    line=findTag(line,PATTERN_MAXPLAYERS,matcher -> {
      maxplayers[0]=Integer.parseInt(matcher.group(1));
    }
);
    line=findTag(line,PATTERN_MINSLOTS,matcher -> {
      minslots[0]=Integer.parseInt(matcher.group(1));
    }
);
    if (startColumn[0] == -1 && column[0] != -1) {
      startColumn[0]=column[0];
    }
    PlayerSorter sorter=parseSortrules(sortrules);
    List<Function<TabListContext,List<Section>>> sections;
    if (!bottom[0]) {
      sections=topSectionProviders;
    }
 else {
      sections=botSectionProviders;
    }
    Matcher fillplayersMatcher=PATTERN_FILLPLAYERS.matcher(line);
    Matcher fillbukkitplayersMatcher=PATTERN_FILLBUKKITPLAYERS.matcher(line);
    if (fillplayersMatcher.matches()) {
      SlotTemplate prefix=parseSlot(fillplayersMatcher.group("String_Node_Str"));
      SlotTemplate suffix=parseSlot(fillplayersMatcher.group("String_Node_Str"));
      String args=fillplayersMatcher.group("String_Node_Str");
      List<String> filter;
      if (args == null || args.isEmpty()) {
        filter=new ArrayList<>();
      }
 else {
        filter=Arrays.asList(args.split("String_Node_Str"));
      }
      if (column[0] == -1) {
        if (config.groupPlayers.equalsIgnoreCase("String_Node_Str") && filter.isEmpty()) {
          sections.add(parseServerSections(config,prefix,suffix,filter,sortrules,minslots[0],maxplayers[0],playerLines,morePlayerLines));
        }
 else {
          boolean allowsExtension=minslots[0] == 0 && maxplayers[0] == 1000 && startColumn[0] == -1;
          if (allowsExtension && !sections.isEmpty() && sections.get(sections.size() - 1) instanceof FillPlayersSection&& ((FillPlayersSection)sections.get(sections.size() - 1)).allowsExtension()) {
            ((FillPlayersSection)sections.get(sections.size() - 1)).addPlayers(parseFilter(filter),prefix,suffix,sorter);
          }
 else {
            sections.add(new FillPlayersSection(startColumn[0],parseFilter(filter),prefix,suffix,sorter,minslots[0],maxplayers[0],playerLines,morePlayerLines));
          }
        }
      }
 else {
        ColumnSplitSection cs;
        if (!sections.isEmpty() && sections.get(sections.size() - 1) instanceof ColumnSplitSection) {
          cs=(ColumnSplitSection)sections.get(sections.size() - 1);
        }
 else {
          cs=new ColumnSplitSection();
          sections.add(cs);
        }
        cs.addColumn(column[0],new PlayerColumn(parseFilter(filter),prefix,suffix,sorter,maxplayers[0],playerLines,morePlayerLines));
      }
    }
 else     if (fillbukkitplayersMatcher.matches()) {
      SlotTemplate prefix=parseSlot(fillbukkitplayersMatcher.group("String_Node_Str"));
      SlotTemplate suffix=parseSlot(fillbukkitplayersMatcher.group("String_Node_Str"));
      sections.add(new FillBukkitPlayersSection(startColumn[0],prefix,suffix,sorter,minslots[0],maxplayers[0],playerLines,morePlayerLines));
    }
 else {
      SlotTemplate template=parseSlot(line);
      StaticSection section;
      if (sections.size() > 0 && sections.get(sections.size() - 1) instanceof StaticSection && startColumn[0] == -1) {
        section=(StaticSection)sections.get(sections.size() - 1);
      }
 else {
        section=new StaticSection(startColumn[0]);
        sections.add(section);
      }
      section.add(template);
    }
  }
  if (config.headerCycleInterval <= 0) {
    config.headerCycleInterval=1;
  }
  if (config.footerCycleInterval <= 0) {
    config.footerCycleInterval=1;
  }
  if (config.header.size() > 1) {
    plugin.requireUpdateInterval(config.headerCycleInterval);
  }
  if (config.footer.size() > 1) {
    plugin.requireUpdateInterval(config.footerCycleInterval);
  }
  SlotTemplate header;
  if (!config.header.isEmpty()) {
    header=SlotTemplate.animate(config.header.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList()),config.headerCycleInterval);
  }
 else {
    header=SlotTemplate.empty();
  }
  SlotTemplate footer;
  if (!config.footer.isEmpty()) {
    footer=SlotTemplate.animate(config.footer.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList()),config.footerCycleInterval);
  }
 else {
    footer=SlotTemplate.empty();
  }
  return new ConfigTabListProvider(topSectionProviders,plugin,config,config.shownFooterHeader,botSectionProviders,header,footer,tab_size);
}

Fixed version (ground truth):
public IConfigTabListProvider parse(TabListConfig config){
  List<SlotTemplate> playerLines=config.playerLines.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList());
  List<SlotTemplate> morePlayerLines=config.morePlayersLines.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList());
  List<Function<TabListContext,List<Section>>> topSectionProviders=new ArrayList<>();
  List<Function<TabListContext,List<Section>>> botSectionProviders=new ArrayList<>();
  final boolean[] bottom={false};
  for (  String line : config.tabList) {
    if (line == null)     continue;
    final int[] startColumn={-1};
    final int[] column={-1};
    final int[] minslots={0};
    final int[] maxplayers={1000};
    final List<String> sortrules=new ArrayList<>();
    line=findTag(line,PATTERN_ALIGN_BOTTOM,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        bottom[0]=true;
      }
    }
);
    line=findTag(line,PATTERN_ALIGN_LEFT,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        startColumn[0]=0;
      }
    }
);
    line=findTag(line,PATTERN_ALIGN_RIGHT,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        startColumn[0]=columns - 1;
      }
    }
);
    line=findTag(line,PATTERN_COLUMN,matcher -> {
      if (config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        column[0]=Integer.parseInt(matcher.group(1));
        if (column[0] >= columns) {
          plugin.getLogger().warning(String.format("String_Node_Str",column[0],columns,columns - 1));
          column[0]=columns - 1;
        }
      }
    }
);
    line=findTag(line,PATTERN_ROW,matcher -> {
      if (!config.verticalMode) {
        plugin.getLogger().warning("String_Node_Str");
      }
 else {
        column[0]=Integer.parseInt(matcher.group(1));
        if (column[0] >= rows) {
          plugin.getLogger().warning(String.format("String_Node_Str",column[0],rows,rows - 1));
          column[0]=rows - 1;
        }
      }
    }
);
    line=findTag(line,PATTERN_SORT,matcher -> {
      sortrules.addAll(Arrays.asList(matcher.group(1).split("String_Node_Str")));
    }
);
    line=findTag(line,PATTERN_MAXPLAYERS,matcher -> {
      maxplayers[0]=Integer.parseInt(matcher.group(1));
    }
);
    line=findTag(line,PATTERN_MINSLOTS,matcher -> {
      minslots[0]=Integer.parseInt(matcher.group(1));
    }
);
    if (startColumn[0] == -1 && column[0] != -1) {
      startColumn[0]=column[0];
    }
    PlayerSorter sorter=parseSortrules(sortrules);
    List<Function<TabListContext,List<Section>>> sections;
    if (!bottom[0]) {
      sections=topSectionProviders;
    }
 else {
      sections=botSectionProviders;
    }
    Matcher fillplayersMatcher=PATTERN_FILLPLAYERS.matcher(line);
    Matcher fillbukkitplayersMatcher=PATTERN_FILLBUKKITPLAYERS.matcher(line);
    if (fillplayersMatcher.matches()) {
      SlotTemplate prefix=parseSlot(fillplayersMatcher.group("String_Node_Str"));
      SlotTemplate suffix=parseSlot(fillplayersMatcher.group("String_Node_Str"));
      String args=fillplayersMatcher.group("String_Node_Str");
      List<String> filter;
      if (args == null || args.isEmpty()) {
        filter=new ArrayList<>();
      }
 else {
        filter=Arrays.asList(args.split("String_Node_Str"));
      }
      if (column[0] == -1 || config.verticalMode) {
        if (config.groupPlayers.equalsIgnoreCase("String_Node_Str") && filter.isEmpty()) {
          sections.add(parseServerSections(config,prefix,suffix,filter,sortrules,minslots[0],maxplayers[0],playerLines,morePlayerLines));
        }
 else {
          boolean allowsExtension=minslots[0] == 0 && maxplayers[0] == 1000 && startColumn[0] == -1;
          if (allowsExtension && !sections.isEmpty() && sections.get(sections.size() - 1) instanceof FillPlayersSection&& ((FillPlayersSection)sections.get(sections.size() - 1)).allowsExtension()) {
            ((FillPlayersSection)sections.get(sections.size() - 1)).addPlayers(parseFilter(filter),prefix,suffix,sorter);
          }
 else {
            sections.add(new FillPlayersSection(startColumn[0],parseFilter(filter),prefix,suffix,sorter,minslots[0],maxplayers[0],playerLines,morePlayerLines));
          }
        }
      }
 else {
        ColumnSplitSection cs;
        if (!sections.isEmpty() && sections.get(sections.size() - 1) instanceof ColumnSplitSection) {
          cs=(ColumnSplitSection)sections.get(sections.size() - 1);
        }
 else {
          cs=new ColumnSplitSection();
          sections.add(cs);
        }
        cs.addColumn(column[0],new PlayerColumn(parseFilter(filter),prefix,suffix,sorter,maxplayers[0],playerLines,morePlayerLines));
      }
    }
 else     if (fillbukkitplayersMatcher.matches()) {
      SlotTemplate prefix=parseSlot(fillbukkitplayersMatcher.group("String_Node_Str"));
      SlotTemplate suffix=parseSlot(fillbukkitplayersMatcher.group("String_Node_Str"));
      sections.add(new FillBukkitPlayersSection(startColumn[0],prefix,suffix,sorter,minslots[0],maxplayers[0],playerLines,morePlayerLines));
    }
 else {
      SlotTemplate template=parseSlot(line);
      StaticSection section;
      if (sections.size() > 0 && sections.get(sections.size() - 1) instanceof StaticSection && startColumn[0] == -1) {
        section=(StaticSection)sections.get(sections.size() - 1);
      }
 else {
        section=new StaticSection(startColumn[0]);
        sections.add(section);
      }
      section.add(template);
    }
  }
  if (config.headerCycleInterval <= 0) {
    config.headerCycleInterval=1;
  }
  if (config.footerCycleInterval <= 0) {
    config.footerCycleInterval=1;
  }
  if (config.header.size() > 1) {
    plugin.requireUpdateInterval(config.headerCycleInterval);
  }
  if (config.footer.size() > 1) {
    plugin.requireUpdateInterval(config.footerCycleInterval);
  }
  SlotTemplate header;
  if (!config.header.isEmpty()) {
    header=SlotTemplate.animate(config.header.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList()),config.headerCycleInterval);
  }
 else {
    header=SlotTemplate.empty();
  }
  SlotTemplate footer;
  if (!config.footer.isEmpty()) {
    footer=SlotTemplate.animate(config.footer.stream().filter(s -> s != null).map(this::parseSlot).collect(Collectors.toList()),config.footerCycleInterval);
  }
 else {
    footer=SlotTemplate.empty();
  }
  return new ConfigTabListProvider(topSectionProviders,plugin,config,config.shownFooterHeader,botSectionProviders,header,footer,tab_size);
}