DebugBar Routes Collector throws ErrorException when optional parameter is not passed to controller

[gustavojm]

Calling a controller method:

public function edit($id = NULL) {

without specifying the optional parameter $id like in http://localsite/admin/article/edit

throws ErrorException with the white screen of death if the debug bar is active.

The same error was reported in the forum by user qury
https://forum.codeigniter.com/thread-67555.html

This is what I've been able to debug so far...

Undefined offset: 0 in
BASEPATH/Debug/Toolbar/Collectors/Routes.php line 99

var_dump($rawParams);
array(1) {
  [0]=>  object(ReflectionParameter)#308 (1) {
  ["name"]=>  string(2) "id" }
}

var_dump($router->params());
array(0)

[lonnieezell]

How is your route defined?