Program: 3643
Project: 3643
Buggy source:
/** 
 * Parse the system classpath. 
 */
private void parseSystemClasspath(){
  clearClasspath();
  final ArrayList<ClassLoader> classLoaders=new ArrayList<>();
  final HashSet<ClassLoader> classLoadersSet=new HashSet<>();
  classLoadersSet.add(ClassLoader.getSystemClassLoader());
  classLoaders.add(ClassLoader.getSystemClassLoader());
  try {
    throw new Exception();
  }
 catch (  final Exception e) {
    final StackTraceElement[] stacktrace=e.getStackTrace();
    if (stacktrace.length >= 3) {
      final ArrayList<ClassLoader> callerClassLoaders=new ArrayList<>();
      final StackTraceElement caller=stacktrace[2];
      for (ClassLoader cl=caller.getClass().getClassLoader(); cl != null; cl=cl.getParent()) {
        callerClassLoaders.add(cl);
      }
      for (int i=callerClassLoaders.size() - 1; i >= 0; --i) {
        final ClassLoader cl=callerClassLoaders.get(i);
        if (classLoadersSet.add(cl)) {
          classLoaders.add(cl);
        }
      }
    }
  }
  if (classLoadersSet.add(Thread.currentThread().getContextClassLoader())) {
    classLoaders.add(Thread.currentThread().getContextClassLoader());
  }
  for (  final ClassLoader cl : classLoaders) {
    if (cl != null) {
      if (cl instanceof URLClassLoader) {
        for (        final URL url : ((URLClassLoader)cl).getURLs()) {
          final String protocol=url.getProtocol();
          if (protocol == null || protocol.equalsIgnoreCase("String_Node_Str")) {
            addClasspathElement(url.getFile());
          }
        }
      }
 else       if (cl.getClass().getName().equals("String_Node_Str")) {
        try {
          final Method getPaths=cl.getClass().getDeclaredMethod("String_Node_Str");
          getPaths.setAccessible(true);
          @SuppressWarnings("String_Node_Str") final Set<String> paths=(Set<String>)getPaths.invoke(cl);
          for (          final String path : paths) {
            addClasspathElement(path);
          }
        }
 catch (        final Exception e) {
          Log.log("String_Node_Str" + cl.getClass().getName() + "String_Node_Str"+ e.getMessage());
        }
      }
 else {
        Log.log("String_Node_Str" + cl.getClass().getName());
      }
    }
  }
  final String classpathProperty=System.getProperty("String_Node_Str");
  if (classpathProperty == null || classpathProperty.isEmpty()) {
    for (    final String pathElement : classpathProperty.split(File.pathSeparator)) {
      addClasspathElement(pathElement);
    }
  }
  initialized=true;
}

Fixed version (ground truth):
/** 
 * Parse the system classpath. 
 */
private void parseSystemClasspath(){
  clearClasspath();
  final ArrayList<ClassLoader> classLoaders=new ArrayList<>();
  final HashSet<ClassLoader> classLoadersSet=new HashSet<>();
  classLoadersSet.add(ClassLoader.getSystemClassLoader());
  classLoaders.add(ClassLoader.getSystemClassLoader());
  try {
    throw new Exception();
  }
 catch (  final Exception e) {
    final StackTraceElement[] stacktrace=e.getStackTrace();
    if (stacktrace.length >= 3) {
      final ArrayList<ClassLoader> callerClassLoaders=new ArrayList<>();
      final StackTraceElement caller=stacktrace[2];
      for (ClassLoader cl=caller.getClass().getClassLoader(); cl != null; cl=cl.getParent()) {
        callerClassLoaders.add(cl);
      }
      for (int i=callerClassLoaders.size() - 1; i >= 0; --i) {
        final ClassLoader cl=callerClassLoaders.get(i);
        if (classLoadersSet.add(cl)) {
          classLoaders.add(cl);
        }
      }
    }
  }
  if (classLoadersSet.add(Thread.currentThread().getContextClassLoader())) {
    classLoaders.add(Thread.currentThread().getContextClassLoader());
  }
  for (  final ClassLoader cl : classLoaders) {
    if (cl != null) {
      if (cl instanceof URLClassLoader) {
        for (        final URL url : ((URLClassLoader)cl).getURLs()) {
          final String protocol=url.getProtocol();
          if (protocol == null || protocol.equalsIgnoreCase("String_Node_Str")) {
            addClasspathElement(url.getFile());
          }
        }
      }
 else       if (cl.getClass().getName().equals("String_Node_Str")) {
        try {
          final Method getPaths=cl.getClass().getDeclaredMethod("String_Node_Str");
          getPaths.setAccessible(true);
          @SuppressWarnings("String_Node_Str") final Set<String> paths=(Set<String>)getPaths.invoke(cl);
          for (          final String path : paths) {
            addClasspathElement(path);
          }
        }
 catch (        final Exception e) {
          Log.log("String_Node_Str" + cl.getClass().getName() + "String_Node_Str"+ e.getMessage());
        }
      }
 else {
        Log.log("String_Node_Str" + cl.getClass().getName());
      }
    }
  }
  addClasspathElements(System.getProperty("String_Node_Str"));
  initialized=true;
}