Program: 168484
Project: 168484
Buggy source:
public static void setPosixOwners(String path,int ownerId,int groupId) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchFieldException {
  Class<?> fileSystemsClass=Class.forName("String_Node_Str");
  Class<?> fileSystemClass=Class.forName("String_Node_Str");
  Class<?> pathClass=Class.forName("String_Node_Str");
  Class<?> filesClass=Class.forName("String_Node_Str");
  Class<?> linkOptionClass=Class.forName("String_Node_Str");
  Method fileSystemsGetDefaultMethod=fileSystemsClass.getMethod("String_Node_Str");
  Method fileSystemGetPathMethod=fileSystemClass.getMethod("String_Node_Str",String.class,String[].class);
  Field noFollowLinksField=linkOptionClass.getField("String_Node_Str");
  Object noFollowLinksObject=noFollowLinksField.get(null);
  Object linkOptionsArray=Array.newInstance(linkOptionClass,1);
  Array.set(linkOptionsArray,0,noFollowLinksObject);
  Object defaultFileSystemObject=fileSystemsGetDefaultMethod.invoke(null);
  Object pObject=fileSystemGetPathMethod.invoke(defaultFileSystemObject,path,new String[0]);
  Method filesSetAttributeMethod=filesClass.getMethod("String_Node_Str",pathClass,String.class,Object.class,linkOptionsArray.getClass());
  filesSetAttributeMethod.invoke(null,pObject,"String_Node_Str",Integer.valueOf(ownerId),linkOptionsArray);
  filesSetAttributeMethod.invoke(null,pObject,"String_Node_Str",Integer.valueOf(groupId),linkOptionsArray);
}

Fixed version (ground truth):
public static void setPosixOwners(String path,int ownerId,int groupId) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchFieldException {
  Class<?> fileSystemsClass=Class.forName("String_Node_Str");
  Class<?> fileSystemClass=Class.forName("String_Node_Str");
  Class<?> pathClass=Class.forName("String_Node_Str");
  Class<?> filesClass=Class.forName("String_Node_Str");
  Class<?> linkOptionClass=Class.forName("String_Node_Str");
  Method fileSystemsGetDefaultMethod=fileSystemsClass.getMethod("String_Node_Str");
  Method fileSystemGetPathMethod=fileSystemClass.getMethod("String_Node_Str",String.class,String[].class);
  Field noFollowLinksField=linkOptionClass.getField("String_Node_Str");
  Object noFollowLinksObject=noFollowLinksField.get(null);
  Object linkOptionsArray=Array.newInstance(linkOptionClass,1);
  Array.set(linkOptionsArray,0,noFollowLinksObject);
  Object defaultFileSystemObject=fileSystemsGetDefaultMethod.invoke(null);
  Object pObject=fileSystemGetPathMethod.invoke(defaultFileSystemObject,path,new String[0]);
  Method filesSetAttributeMethod=filesClass.getMethod("String_Node_Str",pathClass,String.class,Object.class,linkOptionsArray.getClass());
  try {
    filesSetAttributeMethod.invoke(null,pObject,"String_Node_Str",Integer.valueOf(ownerId),linkOptionsArray);
    filesSetAttributeMethod.invoke(null,pObject,"String_Node_Str",Integer.valueOf(groupId),linkOptionsArray);
  }
 catch (  InvocationTargetException ex) {
    if (ex.getCause() instanceof UnsupportedOperationException) {
    }
 else {
      throw ex;
    }
  }
}