Program: 19220
Project: 19220
Buggy source:
private BeanList<T> sort(final String... properties){
  Collections.sort(list,new Comparator<T>(){
    public int compare(    T o1,    T o2){
      try {
        for (int n=0; n < properties.length; n++) {
          boolean ascending=true;
          String property=properties[n];
          if (property.startsWith("String_Node_Str")) {
            ascending=false;
            property=property.substring(1);
          }
          Class type=BeanUtil.getPropertyType(o1,property);
          Method getter=BeanUtil.findGetter(o1.getClass(),property);
          if (getter == null) {
            throw new IllegalStateException("String_Node_Str" + property + "String_Node_Str");
          }
          Object val1=getter.invoke(o1);
          Object val2=getter.invoke(o2);
          int result=0;
switch (nullHandling) {
case AreLess:
            if (val1 == null && val2 == null) {
              continue;
            }
 else             if (val1 == null && val2 != null) {
              return ascending ? -1 : 1;
            }
 else             if (val1 != null && val2 == null) {
              return ascending ? 1 : -1;
            }
          break;
case AreMore:
        if (val1 == null && val2 == null) {
          continue;
        }
 else         if (val1 == null && val2 != null) {
          return ascending ? 1 : -1;
        }
 else         if (val1 != null && val2 == null) {
          return ascending ? -1 : 1;
        }
      break;
  }
  Comparator comparator=getComparator(property,type);
  if (comparator != null) {
    result=comparator.compare(val1,val2);
  }
 else   if (Comparable.class.isAssignableFrom(type)) {
    if (val1 != null) {
      result=((Comparable)val1).compareTo(val2);
    }
 else     if (val2 != null) {
      result=((Comparable)val2).compareTo(val1);
    }
 else {
      result=0;
    }
  }
 else {
    throw new IllegalStateException("String_Node_Str" + type.getName() + "String_Node_Str");
  }
  if (result < 0 || result > 0) {
    return ascending ? result : -result;
  }
}
return 0;
}
 catch (Exception e) {
throw new IllegalStateException("String_Node_Str",e);
}
}
}
);
return this;
}

Fixed version (ground truth):
private BeanList<T> sort(final String... properties){
  Collections.sort(list,new Comparator<T>(){
    @Override public int compare(    T o1,    T o2){
      try {
        for (int n=0; n < properties.length; n++) {
          boolean ascending=true;
          String property=properties[n];
          if (property.startsWith("String_Node_Str")) {
            ascending=false;
            property=property.substring(1);
          }
          Class type=BeanUtil.getPropertyType(o1,property);
          Method getter1=BeanUtil.findGetter(o1.getClass(),property);
          if (getter1 == null) {
            throw new IllegalStateException(String.format("String_Node_Str",property,o1.getClass().getName()));
          }
          Method getter2=BeanUtil.findGetter(o2.getClass(),property);
          if (getter2 == null) {
            throw new IllegalStateException(String.format("String_Node_Str",property,o2.getClass().getName()));
          }
          Object val1=getter1.invoke(o1);
          Object val2=getter2.invoke(o2);
          int result=0;
switch (nullHandling) {
case AreLess:
            if (val1 == null && val2 == null) {
              continue;
            }
 else             if (val1 == null && val2 != null) {
              return ascending ? -1 : 1;
            }
 else             if (val1 != null && val2 == null) {
              return ascending ? 1 : -1;
            }
          break;
case AreMore:
        if (val1 == null && val2 == null) {
          continue;
        }
 else         if (val1 == null && val2 != null) {
          return ascending ? 1 : -1;
        }
 else         if (val1 != null && val2 == null) {
          return ascending ? -1 : 1;
        }
      break;
  }
  Comparator comparator=getComparator(property,type);
  if (comparator != null) {
    result=comparator.compare(val1,val2);
  }
 else   if (Comparable.class.isAssignableFrom(type)) {
    if (val1 != null) {
      result=((Comparable)val1).compareTo(val2);
    }
 else     if (val2 != null) {
      result=((Comparable)val2).compareTo(val1);
    }
 else {
      result=0;
    }
  }
 else {
    throw new IllegalStateException("String_Node_Str" + type.getName() + "String_Node_Str");
  }
  if (result < 0 || result > 0) {
    return ascending ? result : -result;
  }
}
return 0;
}
 catch (Exception e) {
throw new IllegalStateException("String_Node_Str",e);
}
}
}
);
return this;
}