XF 2.2 Pub controller class calls init() for some reason when using fastUpdate()

[asprin]

In my server logs, I'm seeing this message as part of an addon that I'm working on

Error: Call to undefined function Asprin\FB\Pub\Controller\int() src/addons/Asprin/FB/Pub/Controller/Foo.php:293

The stack trace is as follows:

#0 src/addons/Asprin/FB/Pub/Controller/Foo.php(201): Asprin\FB\Pub\Controller\Foo->swapThem(391, 396, 7)
#1 src/XF/Mvc/Dispatcher.php(352): Asprin\FB\Pub\Controller\Foo->actionCheckSwap(Object(XF\Mvc\ParameterBag))
#2 src/XF/Mvc/Dispatcher.php(263): XF\Mvc\Dispatcher->dispatchClass('Asprin\\FB:Foo...', 'CheckSwap', Object(XF\Mvc\RouteMatch), Object(Asprin\FB\Pub\Controller\Foo), NULL)
#3 src/XF/Mvc/Dispatcher.php(115): XF\Mvc\Dispatcher->dispatchFromMatch(Object(XF\Mvc\RouteMatch), Object(Asprin\FB\Pub\Controller\Foo), NULL)
#4 src/XF/Mvc/Dispatcher.php(57): XF\Mvc\Dispatcher->dispatchLoop(Object(XF\Mvc\RouteMatch))
#5 src/XF/App.php(2351): XF\Mvc\Dispatcher->run()
#6 src/XF.php(517): XF\App->run()
#7 index.php(20): XF::runApp('XF\\Pub\\App')
#8 {main}

The class is as follows (the lines specified in stack trace are mentioned below)

<?php

namespace Asprin\FB\Pub\Controller;

use XF\Mvc\ParameterBag;
use XF\Pub\Controller\AbstractController;

use Asprin\FB\Utils as Utils;


class Foo extends AbstractController
{
    public function actionCheckSwap(ParameterBag $params)
    {
        /*
        . some
        . lines
        . of
        . code
        . here
        */
       
        $this->swapThem($what, $with_what, $pos); // line 201
    }
   
    public function swapThem($what, $with_what, $pos)
    {
        /*
        . some
        . lines
        . of
        . code
        . here
        */
       
        $foo = $bar->User->Foo; // line 292
        $foo->fastUpdate('counter', ((int)$bar->actioned + 1)); // line 293
    }
   
}

Going by the culprit line 293, is this happening because $foo is turning out to null/empty? The problem is that it's not happening always, it's random so I've been having a hard time reproducing the error.

But even if it's a case of null/empty, the error message should say something along the lines of call to undefined function on null or something?

 

[asprin]

Cannot believe I misread that. It was not init() but int(). So typecasting a value to int is causing the issue.

What I still don't understand though is why it's causing an issue because (int) <value> is pretty standard PHP code, isn't it?

$foo->fastUpdate('counter', ((int)$bar->actioned + 1));