Program: 58286
Project: 58286
Buggy source:
public void applyEditorConfigRules(DataObject dataObject){
  String filePath=dataObject.getPrimaryFile().getPath();
  LOG.log(Level.INFO,"String_Node_Str",filePath);
  EditorConfig ec=new EditorConfig("String_Node_Str",EditorConfig.VERSION);
  List<EditorConfig.OutPair> rules=new ArrayList<>();
  HashMap<String,String> keyedRules=new HashMap<>();
  for (  EditorConfig.OutPair rule : rules) {
    keyedRules.put(rule.getKey().toLowerCase(),rule.getVal().toLowerCase());
  }
  try {
    rules=ec.getProperties(filePath);
  }
 catch (  EditorConfigException ex) {
    LOG.log(Level.SEVERE,ex.getMessage());
  }
  FileObject primaryFile=dataObject.getPrimaryFile();
  boolean changedStyle=false;
  boolean changed=false;
  for (  EditorConfig.OutPair rule : rules) {
    String key=rule.getKey().toLowerCase();
    String value=rule.getVal().toLowerCase();
    LOG.log(Level.INFO,"String_Node_Str",new Object[]{Tab.ONE,key,value});
switch (key) {
case EditorConfigConstant.CHARSET:
      changed=CharsetOperation.doCharset(dataObject,value,getLineEnding(keyedRules.get(EditorConfigConstant.END_OF_LINE)));
    changedStyle=changedStyle || changed;
  break;
case EditorConfigConstant.END_OF_LINE:
changed=LineEndingOperation.doLineEnding(dataObject,value);
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.INDENT_SIZE:
changed=IndentSizeOperation.doIndentSize(primaryFile,value);
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.INDENT_STYLE:
changed=IndentStyleOperation.doIndentStyle(primaryFile,value);
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.INSERT_FINAL_NEWLINE:
changed=FinalNewLineOperation.doFinalNewLine(primaryFile,getLineEnding(keyedRules.get(EditorConfigConstant.END_OF_LINE)));
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.TAB_WIDTH:
changed=TabWidthOperation.doTabWidth(primaryFile,value);
changedStyle=changedStyle || changed;
break;
default :
LOG.log(Level.WARNING,"String_Node_Str",key);
}
}
Preferences codeStyle=CodeStylePreferences.get(primaryFile,primaryFile.getMIMEType()).getPreferences();
if (changedStyle) {
try {
codeStyle.flush();
}
 catch (BackingStoreException ex) {
LOG.log(Level.SEVERE,"String_Node_Str",ex.getMessage());
}
}
}

Fixed version (ground truth):
public void applyEditorConfigRules(DataObject dataObject){
  String filePath=dataObject.getPrimaryFile().getPath();
  LOG.log(Level.INFO,"String_Node_Str",filePath);
  EditorConfig ec=new EditorConfig("String_Node_Str",EditorConfig.VERSION);
  List<EditorConfig.OutPair> rules=new ArrayList<>();
  try {
    rules=ec.getProperties(filePath);
  }
 catch (  EditorConfigException ex) {
    LOG.log(Level.SEVERE,ex.getMessage());
  }
  HashMap<String,String> keyedRules=new HashMap<>();
  for (  EditorConfig.OutPair rule : rules) {
    keyedRules.put(rule.getKey().toLowerCase(),rule.getVal().toLowerCase());
  }
  FileObject primaryFile=dataObject.getPrimaryFile();
  boolean changedStyle=false;
  boolean changed=false;
  for (  EditorConfig.OutPair rule : rules) {
    String key=rule.getKey().toLowerCase();
    String value=rule.getVal().toLowerCase();
    LOG.log(Level.INFO,"String_Node_Str",new Object[]{Tab.ONE,key,value});
switch (key) {
case EditorConfigConstant.CHARSET:
      changed=CharsetOperation.doCharset(dataObject,value,getLineEnding(keyedRules.get(EditorConfigConstant.END_OF_LINE)));
    changedStyle=changedStyle || changed;
  break;
case EditorConfigConstant.END_OF_LINE:
changed=LineEndingOperation.doLineEnding(dataObject,value);
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.INDENT_SIZE:
changed=IndentSizeOperation.doIndentSize(primaryFile,value);
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.INDENT_STYLE:
changed=IndentStyleOperation.doIndentStyle(primaryFile,value);
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.INSERT_FINAL_NEWLINE:
changed=FinalNewLineOperation.doFinalNewLine(primaryFile,getLineEnding(keyedRules.get(EditorConfigConstant.END_OF_LINE)));
changedStyle=changedStyle || changed;
break;
case EditorConfigConstant.TAB_WIDTH:
changed=TabWidthOperation.doTabWidth(primaryFile,value);
changedStyle=changedStyle || changed;
break;
default :
LOG.log(Level.WARNING,"String_Node_Str",key);
}
}
Preferences codeStyle=CodeStylePreferences.get(primaryFile,primaryFile.getMIMEType()).getPreferences();
if (changedStyle) {
try {
codeStyle.flush();
}
 catch (BackingStoreException ex) {
LOG.log(Level.SEVERE,"String_Node_Str",ex.getMessage());
}
}
}