Program: 64121
Project: 64121
Buggy source:
/** 
 * Parses the project file, configuring the project as it goes.
 * @param project the current project
 * @param source  the xml source
 * @param handler the root handler to use (contains the current context)
 * @exception BuildException if the configuration is invalid or cannotbe read
 */
public void parse(Project project,Object source,RootHandler handler) throws BuildException {
  AntXMLContext context=handler.context;
  File buildFile=null;
  URL url=null;
  String buildFileName=null;
  if (source instanceof File) {
    buildFile=(File)source;
  }
 else   if (source instanceof URL) {
    url=(URL)source;
  }
 else   if (source instanceof Resource) {
    FileProvider fp=((Resource)source).as(FileProvider.class);
    if (fp != null) {
      buildFile=fp.getFile();
    }
 else {
      URLProvider up=((Resource)source).as(URLProvider.class);
      if (up != null) {
        url=up.getURL();
      }
    }
  }
  if (buildFile != null) {
    buildFile=FILE_UTILS.normalize(buildFile.getAbsolutePath());
    context.setBuildFile(buildFile);
    buildFileName=buildFile.toString();
  }
 else   if (url != null) {
    try {
      context.setBuildFile((File)null);
      context.setBuildFile(url);
    }
 catch (    java.net.MalformedURLException ex) {
      throw new BuildException(ex);
    }
    buildFileName=url.toString();
  }
 else {
    throw new BuildException("String_Node_Str" + source.getClass().getName() + "String_Node_Str");
  }
  InputStream inputStream=null;
  InputSource inputSource=null;
  ZipFile zf=null;
  try {
    XMLReader parser=JAXPUtils.getNamespaceXMLReader();
    String uri=null;
    if (buildFile != null) {
      uri=FILE_UTILS.toURI(buildFile.getAbsolutePath());
      inputStream=new FileInputStream(buildFile);
    }
 else {
      uri=url.toString();
      int pling=-1;
      if (uri.startsWith("String_Node_Str") && (pling=uri.indexOf("String_Node_Str")) > -1) {
        zf=new ZipFile(org.apache.tools.ant.launch.Locator.fromJarURI(uri),"String_Node_Str");
        inputStream=zf.getInputStream(zf.getEntry(uri.substring(pling + 1)));
      }
 else {
        URLConnection conn=url.openConnection();
        conn.setUseCaches(false);
        inputStream=conn.getInputStream();
      }
    }
    inputSource=new InputSource(inputStream);
    if (uri != null) {
      inputSource.setSystemId(uri);
    }
    project.log("String_Node_Str" + buildFileName + "String_Node_Str"+ uri+ (zf != null ? "String_Node_Str" : "String_Node_Str"),Project.MSG_VERBOSE);
    DefaultHandler hb=handler;
    parser.setContentHandler(hb);
    parser.setEntityResolver(hb);
    parser.setErrorHandler(hb);
    parser.setDTDHandler(hb);
    parser.parse(inputSource);
  }
 catch (  SAXParseException exc) {
    Location location=new Location(exc.getSystemId(),exc.getLineNumber(),exc.getColumnNumber());
    Throwable t=exc.getException();
    if (t instanceof BuildException) {
      BuildException be=(BuildException)t;
      if (be.getLocation() == Location.UNKNOWN_LOCATION) {
        be.setLocation(location);
      }
      throw be;
    }
    throw new BuildException(exc.getMessage(),t == null ? exc : t,location);
  }
catch (  SAXException exc) {
    Throwable t=exc.getException();
    if (t instanceof BuildException) {
      throw (BuildException)t;
    }
    throw new BuildException(exc.getMessage(),t == null ? exc : t);
  }
catch (  FileNotFoundException exc) {
    throw new BuildException(exc);
  }
catch (  UnsupportedEncodingException exc) {
    throw new BuildException("String_Node_Str" + buildFileName + "String_Node_Str",exc);
  }
catch (  IOException exc) {
    throw new BuildException("String_Node_Str" + buildFileName + "String_Node_Str"+ exc.getMessage(),exc);
  }
 finally {
    FileUtils.close(inputStream);
    ZipFile.closeQuietly(zf);
  }
}

Fixed version (ground truth):
/** 
 * Parses the project file, configuring the project as it goes.
 * @param project the current project
 * @param source  the xml source
 * @param handler the root handler to use (contains the current context)
 * @exception BuildException if the configuration is invalid or cannotbe read
 */
public void parse(Project project,Object source,RootHandler handler) throws BuildException {
  AntXMLContext context=handler.context;
  File buildFile=null;
  URL url=null;
  String buildFileName=null;
  if (source instanceof File) {
    buildFile=(File)source;
  }
 else   if (source instanceof URL) {
    url=(URL)source;
  }
 else   if (source instanceof Resource) {
    FileProvider fp=((Resource)source).as(FileProvider.class);
    if (fp != null) {
      buildFile=fp.getFile();
    }
 else {
      URLProvider up=((Resource)source).as(URLProvider.class);
      if (up != null) {
        url=up.getURL();
      }
    }
  }
  if (buildFile != null) {
    buildFile=FILE_UTILS.normalize(buildFile.getAbsolutePath());
    context.setBuildFile(buildFile);
    buildFileName=buildFile.toString();
  }
 else   if (url != null) {
    try {
      context.setBuildFile((File)null);
      context.setBuildFile(url);
    }
 catch (    java.net.MalformedURLException ex) {
      throw new BuildException(ex);
    }
    buildFileName=url.toString();
  }
 else {
    throw new BuildException("String_Node_Str" + source.getClass().getName() + "String_Node_Str");
  }
  InputStream inputStream=null;
  InputSource inputSource=null;
  ZipFile zf=null;
  try {
    XMLReader parser=JAXPUtils.getNamespaceXMLReader();
    String uri=null;
    if (buildFile != null) {
      uri=FILE_UTILS.toURI(buildFile.getAbsolutePath());
      inputStream=new FileInputStream(buildFile);
    }
 else {
      uri=url.toString();
      int pling=-1;
      if (uri.startsWith("String_Node_Str") && (pling=uri.indexOf("String_Node_Str")) > -1) {
        zf=new ZipFile(org.apache.tools.ant.launch.Locator.fromJarURI(uri),"String_Node_Str");
        inputStream=zf.getInputStream(zf.getEntry(uri.substring(pling + 2)));
      }
 else {
        URLConnection conn=url.openConnection();
        conn.setUseCaches(false);
        inputStream=conn.getInputStream();
      }
    }
    inputSource=new InputSource(inputStream);
    if (uri != null) {
      inputSource.setSystemId(uri);
    }
    project.log("String_Node_Str" + buildFileName + "String_Node_Str"+ uri+ (zf != null ? "String_Node_Str" : "String_Node_Str"),Project.MSG_VERBOSE);
    DefaultHandler hb=handler;
    parser.setContentHandler(hb);
    parser.setEntityResolver(hb);
    parser.setErrorHandler(hb);
    parser.setDTDHandler(hb);
    parser.parse(inputSource);
  }
 catch (  SAXParseException exc) {
    Location location=new Location(exc.getSystemId(),exc.getLineNumber(),exc.getColumnNumber());
    Throwable t=exc.getException();
    if (t instanceof BuildException) {
      BuildException be=(BuildException)t;
      if (be.getLocation() == Location.UNKNOWN_LOCATION) {
        be.setLocation(location);
      }
      throw be;
    }
    throw new BuildException(exc.getMessage(),t == null ? exc : t,location);
  }
catch (  SAXException exc) {
    Throwable t=exc.getException();
    if (t instanceof BuildException) {
      throw (BuildException)t;
    }
    throw new BuildException(exc.getMessage(),t == null ? exc : t);
  }
catch (  FileNotFoundException exc) {
    throw new BuildException(exc);
  }
catch (  UnsupportedEncodingException exc) {
    throw new BuildException("String_Node_Str" + buildFileName + "String_Node_Str",exc);
  }
catch (  IOException exc) {
    throw new BuildException("String_Node_Str" + buildFileName + "String_Node_Str"+ exc.getMessage(),exc);
  }
 finally {
    FileUtils.close(inputStream);
    ZipFile.closeQuietly(zf);
  }
}