Program: 136708
Project: 136708
Buggy source:
@Override public Image getImage(Object obj){
  ModelElement modelElement=null;
  if (obj instanceof ModelElement) {
    modelElement=(ModelElement)obj;
  }
 else   if (obj instanceof ImpactNode) {
    modelElement=((ImpactNode)obj).getNodeElement();
  }
 else   if (obj instanceof IFile) {
    modelElement=ModelElementFileFactory.getModelElement((IFile)obj);
  }
 else   if (obj instanceof RepositoryViewObject) {
    return ImageLib.getImage(ImageLib.JRXML_ICON);
  }
  if (modelElement == null) {
    if (((ImpactNode)obj).getNode() != null) {
      return ImageLib.getImage(ImageLib.JRXML_ICON);
    }
    return super.getImage(obj);
  }
  Image modelElementImage=null;
  String imgName=null;
  if (modelElement instanceof Analysis) {
    imgName=ImageLib.ANALYSIS_OBJECT;
  }
 else   if (modelElement instanceof TdReport) {
    imgName=ImageLib.REPORT_OBJECT;
  }
 else   if (modelElement instanceof DatabaseConnection) {
    imgName=ImageLib.CONNECTION;
  }
 else   if (modelElement instanceof DelimitedFileConnection) {
    imgName=ImageLib.FILE_DELIMITED;
  }
 else   if (modelElement instanceof Pattern) {
    imgName=ImageLib.PATTERN_REG;
  }
 else   if (modelElement instanceof IndicatorDefinition) {
    if (modelElement instanceof DQRule) {
      imgName=ImageLib.DQ_RULE;
    }
 else     if (modelElement instanceof MatchRuleDefinition) {
      imgName=ImageLib.MATCH_RULE_ICON;
    }
 else {
      imgName=ImageLib.IND_DEFINITION;
    }
  }
 else   if (modelElement instanceof MetadataTable) {
    imgName=ImageLib.TABLE;
  }
  if (imgName != null) {
    modelElementImage=ImageLib.getImage(imgName);
  }
  if (modelElementImage != null) {
    if (modelElement != null) {
      Property property=PropertyHelper.getProperty(modelElement);
      if (property != null) {
        Item item=property.getItem();
        if (item != null) {
          if (ProxyRepositoryManager.getInstance().isLockByUserOwn(item)) {
            modelElementImage=ImageLib.createLockedByOwnIcon(imgName).createImage();
            imagesNeedDisposedList.add(modelElementImage);
          }
 else           if (ProxyRepositoryManager.getInstance().isLockByOthers(item)) {
            modelElementImage=ImageLib.createLockedByOtherIcon(imgName).createImage();
            imagesNeedDisposedList.add(modelElementImage);
          }
        }
      }
    }
    return modelElementImage;
  }
  return super.getImage(obj);
}

Fixed version (ground truth):
@Override public Image getImage(Object obj){
  ModelElement modelElement=null;
  if (obj instanceof ModelElement) {
    modelElement=(ModelElement)obj;
  }
 else   if (obj instanceof ImpactNode) {
    modelElement=((ImpactNode)obj).getNodeElement();
  }
 else   if (obj instanceof IFile) {
    modelElement=ModelElementFileFactory.getModelElement((IFile)obj);
  }
 else   if (obj instanceof RepositoryViewObject) {
    return ImageLib.getImage(ImageLib.JRXML_ICON);
  }
  if (modelElement == null) {
    if (((ImpactNode)obj).getNode() != null) {
      return ImageLib.getImage(ImageLib.JRXML_ICON);
    }
    return super.getImage(obj);
  }
  Image modelElementImage=null;
  String imgName=null;
  if (modelElement instanceof Analysis) {
    imgName=ImageLib.ANALYSIS_OBJECT;
  }
 else   if (modelElement instanceof TdReport) {
    imgName=ImageLib.REPORT_OBJECT;
  }
 else   if (modelElement instanceof DatabaseConnection) {
    imgName=ImageLib.CONNECTION;
  }
 else   if (modelElement instanceof DelimitedFileConnection) {
    imgName=ImageLib.FILE_DELIMITED;
  }
 else   if (modelElement instanceof Pattern) {
    imgName=ImageLib.PATTERN_REG;
  }
 else   if (modelElement instanceof IndicatorDefinition) {
    if (modelElement instanceof DQRule) {
      imgName=ImageLib.DQ_RULE;
    }
 else     if (modelElement instanceof MatchRuleDefinition) {
      imgName=ImageLib.MATCH_RULE_ICON;
    }
 else {
      imgName=ImageLib.IND_DEFINITION;
    }
  }
 else   if (modelElement instanceof MetadataTable) {
    imgName=ImageLib.TABLE;
  }
  if (imgName != null) {
    modelElementImage=ImageLib.getImage(imgName);
  }
  if (modelElementImage != null) {
    if (modelElement != null) {
      Property property=PropertyHelper.getProperty(modelElement);
      if (property != null) {
        Item item=property.getItem();
        if (item != null) {
          if (ProxyRepositoryManager.getInstance().isLockByUserOwn(item)) {
            modelElementImage=ImageLib.createLockedByOwnIcon(imgName);
            imagesNeedDisposedList.add(modelElementImage);
          }
 else           if (ProxyRepositoryManager.getInstance().isLockByOthers(item)) {
            modelElementImage=ImageLib.createLockedByOtherIcon(imgName);
            imagesNeedDisposedList.add(modelElementImage);
          }
        }
      }
    }
    return modelElementImage;
  }
  return super.getImage(obj);
}