redirect($namedRoute) missing helpful exception

[MGatner]

Passing an invalid named route to redirect() causes a type error:

SYSTEMPATH/Router/RouteCollection.php at line 1117
ltrim() expects parameter 1 to be string, object given
...
1115                 // Lose any namespace slash at beginning of strings
1116                 // to ensure more consistent match.
1117                 $to     = ltrim($to, '\\');

This should be throwing something helpful, like HTTPException::forInvalidRedirectRoute. Tested with and without custom route definitions.

• PHP: 7.2.16
• CodeIgniter: 4.0.0-beta.2

[MGatner]

It seems to be choking on Closures, trying to use ltrim() on them. Since this section is explicitly looking for a string match to $search I think it would be find to skip anything else:

foreach ($collection as $route)
{
	$from = key($route['route']);
	$to   = $route['route'][$from];
	if (! is_string($to))
	{
		 continue;
	}
...