Program: 24140
Project: 24140
Buggy source:
private Cell generateDescription(HeirarchicalTableGenerator gen,Row row,ElementComponent definition,ElementComponent fallback,boolean used,String baseURL,String url,ProfileKnowledgeProvider pkp,Profile profile) throws Exception {
  Cell c=gen.new Cell();
  row.getCells().add(c);
  if (used) {
    if (definition.getDefinition() != null && definition.getDefinition().getShort() != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      c.addPiece(gen.new Piece(null,definition.getDefinition().getShort(),null));
    }
 else     if (fallback != null && fallback.getDefinition() != null && fallback.getDefinition().getShort() != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      c.addPiece(gen.new Piece(null,fallback.getDefinition().getShort(),null));
    }
    if (url != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      String fullUrl=url.startsWith("String_Node_Str") ? baseURL + url : url;
      String ref=pkp.getLinkForExtension(profile,url);
      c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
      c.getPieces().add(gen.new Piece(ref,fullUrl,null));
    }
    if (definition.getSlicing() != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
      c.getPieces().add(gen.new Piece(null,describeSlice(definition.getSlicing()),null));
    }
    if (definition.getDefinition() != null) {
      if (definition.getDefinition().getBinding() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        String ref=pkp.resolveBinding(definition.getDefinition().getBinding());
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(ref,definition.getDefinition().getBinding().getName(),null));
        if (definition.getDefinition().getBinding().getConformance() != null || definition.getDefinition().getBinding().getIsExtensibleElement() != null) {
          c.getPieces().add(gen.new Piece(null,"String_Node_Str",null));
          if (definition.getDefinition().getBinding().getConformance() != null)           c.getPieces().add(gen.new Piece(null,definition.getDefinition().getBinding().getConformance().toCode(),definition.getDefinition().getBinding().getConformance().getDefinition()));
          if (definition.getDefinition().getBinding().getIsExtensibleElement() != null)           c.getPieces().add(gen.new Piece(null,definition.getDefinition().getBinding().getIsExtensibleElement().toString(),null));
          c.getPieces().add(gen.new Piece(null,"String_Node_Str",null));
        }
      }
      for (      ElementDefinitionConstraintComponent inv : definition.getDefinition().getConstraint()) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str" + inv.getKey() + "String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,inv.getHuman(),null));
      }
      if (definition.getDefinition().getValue() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,buildJson(definition.getDefinition().getValue()),null).addStyle("String_Node_Str"));
      }
 else       if (definition.getDefinition().getPattern() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,buildJson(definition.getDefinition().getPattern()),null).addStyle("String_Node_Str"));
      }
 else       if (definition.getDefinition().getExample() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,buildJson(definition.getDefinition().getExample()),null).addStyle("String_Node_Str"));
      }
    }
  }
  return c;
}

Fixed version (ground truth):
private Cell generateDescription(HeirarchicalTableGenerator gen,Row row,ElementComponent definition,ElementComponent fallback,boolean used,String baseURL,String url,ProfileKnowledgeProvider pkp,Profile profile) throws Exception {
  Cell c=gen.new Cell();
  row.getCells().add(c);
  if (used) {
    if (definition.getDefinition() != null && definition.getDefinition().getShort() != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      c.addPiece(gen.new Piece(null,definition.getDefinition().getShort(),null));
    }
 else     if (fallback != null && fallback.getDefinition() != null && fallback.getDefinition().getShort() != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      c.addPiece(gen.new Piece(null,fallback.getDefinition().getShort(),null));
    }
    if (url != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      String fullUrl=url.startsWith("String_Node_Str") ? baseURL + url : url;
      String ref=pkp.getLinkForExtension(profile,url);
      c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
      c.getPieces().add(gen.new Piece(ref,fullUrl,null));
    }
    if (definition.getSlicing() != null) {
      if (!c.getPieces().isEmpty())       c.addPiece(gen.new Piece("String_Node_Str"));
      c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
      c.getPieces().add(gen.new Piece(null,describeSlice(definition.getSlicing()),null));
    }
    if (definition.getDefinition() != null) {
      if (definition.getDefinition().getBinding() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        String ref=pkp.resolveBinding(definition.getDefinition().getBinding());
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(ref,definition.getDefinition().getBinding().getName(),null));
        if (definition.getDefinition().getBinding().getConformance() != null || definition.getDefinition().getBinding().getIsExtensibleElement() != null) {
          c.getPieces().add(gen.new Piece(null,"String_Node_Str",null));
          if (definition.getDefinition().getBinding().getConformance() != null)           c.getPieces().add(gen.new Piece(null,definition.getDefinition().getBinding().getConformance().toCode(),definition.getDefinition().getBinding().getConformance().getDefinition()));
          if (definition.getDefinition().getBinding().getConformance() != null && definition.getDefinition().getBinding().getIsExtensibleElement() != null)           c.getPieces().add(gen.new Piece(null,"String_Node_Str",null));
          if (definition.getDefinition().getBinding().getIsExtensibleElement() != null)           c.getPieces().add(gen.new Piece(null,definition.getDefinition().getBinding().getIsExtensible() ? "String_Node_Str" : "String_Node_Str",null));
          c.getPieces().add(gen.new Piece(null,"String_Node_Str",null));
        }
      }
      for (      ElementDefinitionConstraintComponent inv : definition.getDefinition().getConstraint()) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str" + inv.getKey() + "String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,inv.getHuman(),null));
      }
      if (definition.getDefinition().getValue() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,buildJson(definition.getDefinition().getValue()),null).addStyle("String_Node_Str"));
      }
 else       if (definition.getDefinition().getPattern() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,buildJson(definition.getDefinition().getPattern()),null).addStyle("String_Node_Str"));
      }
 else       if (definition.getDefinition().getExample() != null) {
        if (!c.getPieces().isEmpty())         c.addPiece(gen.new Piece("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,"String_Node_Str",null).addStyle("String_Node_Str"));
        c.getPieces().add(gen.new Piece(null,buildJson(definition.getDefinition().getExample()),null).addStyle("String_Node_Str"));
      }
    }
  }
  return c;
}