Program: 93539
Project: 93539
Buggy source:
/** 
 * Handles the request.
 * @param exchange
 * @param context
 * @throws Exception
 */
@Override public void handleRequest(HttpServerExchange exchange,RequestContext context) throws Exception {
  if (context.getMethod() == METHOD.OPTIONS) {
    exchange.getResponseHeaders().put(HttpString.tryFromString("String_Node_Str"),"String_Node_Str");
    exchange.getResponseHeaders().put(HttpString.tryFromString("String_Node_Str"),"String_Node_Str");
    exchange.setResponseCode(HttpStatus.SC_OK);
    exchange.endExchange();
  }
 else   if (context.getMethod() == METHOD.GET) {
    if (!(context.getUnmappedRequestUri().equals(URLUtils.removeTrailingSlashes(url) + "String_Node_Str" + exchange.getSecurityContext().getAuthenticatedAccount().getPrincipal().getName()))) {
      exchange.setResponseCode(HttpStatus.SC_UNAUTHORIZED);
      exchange.getResponseHeaders().remove(AUTH_TOKEN_HEADER);
      exchange.getResponseHeaders().remove(AUTH_TOKEN_VALID_HEADER);
      exchange.getResponseHeaders().remove(AUTH_TOKEN_LOCATION_HEADER);
      exchange.endExchange();
      return;
    }
    Representation rep=new Representation(url);
    if (exchange.getSecurityContext() == null || exchange.getSecurityContext().getAuthenticatedAccount() == null || exchange.getSecurityContext().getAuthenticatedAccount().getPrincipal() == null) {
      BasicDBObject root=new BasicDBObject();
      root.append("String_Node_Str",false);
      root.append("String_Node_Str",null);
      rep.addProperties(root);
    }
 else {
      BasicDBObject root=new BasicDBObject();
      Set<String> _roles=exchange.getSecurityContext().getAuthenticatedAccount().getRoles();
      root.append("String_Node_Str",true);
      root.append("String_Node_Str",_roles);
      rep.addProperties(root);
    }
    exchange.getResponseHeaders().put(Headers.CONTENT_TYPE,HAL_JSON_MEDIA_TYPE);
    exchange.getResponseSender().send(rep.toString());
    exchange.endExchange();
  }
 else {
    exchange.setResponseCode(HttpStatus.SC_METHOD_NOT_ALLOWED);
    exchange.endExchange();
  }
}

Fixed version (ground truth):
/** 
 * Handles the request.
 * @param exchange
 * @param context
 * @throws Exception
 */
@Override public void handleRequest(HttpServerExchange exchange,RequestContext context) throws Exception {
  Representation rep;
  if (context.getMethod() == METHOD.OPTIONS) {
    exchange.getResponseHeaders().put(HttpString.tryFromString("String_Node_Str"),"String_Node_Str");
    exchange.getResponseHeaders().put(HttpString.tryFromString("String_Node_Str"),"String_Node_Str");
    exchange.setResponseCode(HttpStatus.SC_OK);
    exchange.endExchange();
  }
 else   if (context.getMethod() == METHOD.GET) {
    if ((exchange.getSecurityContext() == null || exchange.getSecurityContext().getAuthenticatedAccount() == null || exchange.getSecurityContext().getAuthenticatedAccount().getPrincipal() == null) || !(context.getUnmappedRequestUri().equals(URLUtils.removeTrailingSlashes(url) + "String_Node_Str" + exchange.getSecurityContext().getAuthenticatedAccount().getPrincipal().getName()))) {
{
        exchange.setResponseCode(HttpStatus.SC_UNAUTHORIZED);
        exchange.getResponseHeaders().remove(AUTH_TOKEN_HEADER);
        exchange.getResponseHeaders().remove(AUTH_TOKEN_VALID_HEADER);
        exchange.getResponseHeaders().remove(AUTH_TOKEN_LOCATION_HEADER);
        exchange.endExchange();
        return;
      }
    }
 else {
      rep=new Representation(URLUtils.removeTrailingSlashes(url) + "String_Node_Str" + exchange.getSecurityContext().getAuthenticatedAccount().getPrincipal().getName());
      BasicDBObject root=new BasicDBObject();
      Set<String> _roles=exchange.getSecurityContext().getAuthenticatedAccount().getRoles();
      root.append("String_Node_Str",true);
      root.append("String_Node_Str",_roles);
      rep.addProperties(root);
    }
    exchange.getResponseHeaders().put(Headers.CONTENT_TYPE,HAL_JSON_MEDIA_TYPE);
    exchange.getResponseSender().send(rep.toString());
    exchange.endExchange();
  }
 else {
    exchange.setResponseCode(HttpStatus.SC_METHOD_NOT_ALLOWED);
    exchange.endExchange();
  }
}