Program: 64129
Project: 64129
Buggy source:
/** 
 * Run the definition.
 * @exception BuildException if an error occurs
 */
public void execute() throws BuildException {
  ClassLoader al=createLoader();
  if (!definerSet) {
    if (getURI() == null) {
      throw new BuildException("String_Node_Str" + getTaskName() + "String_Node_Str",getLocation());
    }
    if (getURI().startsWith(MagicNames.ANTLIB_PREFIX)) {
      String uri1=getURI();
      setResource(makeResourceFromURI(uri1));
    }
 else {
      throw new BuildException("String_Node_Str" + "String_Node_Str" + getURI());
    }
  }
  if (name != null) {
    if (classname == null) {
      throw new BuildException("String_Node_Str" + getTaskName() + "String_Node_Str"+ "String_Node_Str",getLocation());
    }
    addDefinition(al,name,classname);
  }
 else {
    if (classname != null) {
      String msg="String_Node_Str" + "String_Node_Str";
      throw new BuildException(msg,getLocation());
    }
    Enumeration urls=null;
    if (file != null) {
      final URL url=fileToURL();
      if (url == null) {
        return;
      }
      urls=new Enumeration(){
        private boolean more=true;
        public boolean hasMoreElements(){
          return more;
        }
        public Object nextElement() throws NoSuchElementException {
          if (more) {
            more=false;
            return url;
          }
 else {
            throw new NoSuchElementException();
          }
        }
      }
;
    }
 else {
      urls=resourceToURLs(al);
    }
    while (urls.hasMoreElements()) {
      URL url=(URL)urls.nextElement();
      int fmt=this.format;
      if (url.toString().toLowerCase(Locale.ENGLISH).endsWith("String_Node_Str")) {
        fmt=Format.XML;
      }
      if (fmt == Format.PROPERTIES) {
        loadProperties(al,url);
        break;
      }
 else {
        if (resourceStack.getStack().get(url) != null) {
          log("String_Node_Str" + url + "String_Node_Str"+ "String_Node_Str"+ getLocation()+ "String_Node_Str"+ resourceStack.getStack().get(url),Project.MSG_WARN);
        }
 else {
          try {
            resourceStack.getStack().put(url,getLocation());
            loadAntlib(al,url);
          }
  finally {
            resourceStack.getStack().remove(url);
          }
        }
      }
    }
  }
}

Fixed version (ground truth):
/** 
 * Run the definition.
 * @exception BuildException if an error occurs
 */
public void execute() throws BuildException {
  ClassLoader al=createLoader();
  if (!definerSet) {
    if (getURI() == null) {
      throw new BuildException("String_Node_Str" + getTaskName() + "String_Node_Str",getLocation());
    }
    if (getURI().startsWith(MagicNames.ANTLIB_PREFIX)) {
      String uri1=getURI();
      setResource(makeResourceFromURI(uri1));
    }
 else {
      throw new BuildException("String_Node_Str" + "String_Node_Str" + getURI() + "String_Node_Str");
    }
  }
  if (name != null) {
    if (classname == null) {
      throw new BuildException("String_Node_Str" + getTaskName() + "String_Node_Str"+ "String_Node_Str",getLocation());
    }
    addDefinition(al,name,classname);
  }
 else {
    if (classname != null) {
      String msg="String_Node_Str" + "String_Node_Str";
      throw new BuildException(msg,getLocation());
    }
    Enumeration urls=null;
    if (file != null) {
      final URL url=fileToURL();
      if (url == null) {
        return;
      }
      urls=new Enumeration(){
        private boolean more=true;
        public boolean hasMoreElements(){
          return more;
        }
        public Object nextElement() throws NoSuchElementException {
          if (more) {
            more=false;
            return url;
          }
 else {
            throw new NoSuchElementException();
          }
        }
      }
;
    }
 else {
      urls=resourceToURLs(al);
    }
    while (urls.hasMoreElements()) {
      URL url=(URL)urls.nextElement();
      int fmt=this.format;
      if (url.toString().toLowerCase(Locale.ENGLISH).endsWith("String_Node_Str")) {
        fmt=Format.XML;
      }
      if (fmt == Format.PROPERTIES) {
        loadProperties(al,url);
        break;
      }
 else {
        if (resourceStack.getStack().get(url) != null) {
          log("String_Node_Str" + url + "String_Node_Str"+ "String_Node_Str"+ getLocation()+ "String_Node_Str"+ resourceStack.getStack().get(url),Project.MSG_WARN);
        }
 else {
          try {
            resourceStack.getStack().put(url,getLocation());
            loadAntlib(al,url);
          }
  finally {
            resourceStack.getStack().remove(url);
          }
        }
      }
    }
  }
}