Segmentation fault during Laravel Migration - php

Question

The problem
As per my previous question here, it was pointed out to me that I shouldn't be trying to fill related models in a Laravel Factory (i.e I should fill them in their own factory).
However, I have an observer that looks for the related data during the creation and tries to fill related models (this is so I can create multiple related entities using just the create:: method and a single multistep form). Now, I need to add a check to see if this data is populated in the observer so I don't have to specify it in the factory.
In doing so, I now get a segmentation fault when trying to seed my database. I've narrowed down the cause to this line - without the isset check, it works fine (other than $data['day'] is not specified, hence the check);
Segmentation fault (core dumped)
if(isset($data['day'])) $event->day->fill($data['day']);
Related Code
EventFactory.php
$factory->define(App\Event::class, function (Faker $faker) {
return [
"name" => "A Test Event",
"description" => $faker->paragraphs(3, true),
"event_start_date" => today(),
"event_opening_date" => today(),
"event_closing_date" => tomorrow(),
"user_id" => 1,
"banner_id" => 1,
"gallery_id" => 1,
"related_event_id" => 1,
"status" => "published",
"purchase_limit" => 1000,
"limit_remaining" => 1000,
"delivery_method" => "collection",
"merchandise_delivery_method" => "collection"
];
});
EventObserver.php
public function created($event){
# get all attributes
$data = $event->getAttributes();
# fill any related models
if(isset($data['day'])) $event->day->fill($data['day']);
# save user
$event->push();
}
public function updating($model){
# get all attributes
$data = $model->getAttributes();
# fill any related models
if(isset($data['day'])) $model->day->fill($data['day']);
# save user
$model->push();
}
Other Info
Command: sudo php artisan migrate:reset --seed
Host: Windows 10
VM Environment: Vagrant running Ubuntu 16.04 via HyperV, mounted share with Samba
PHP Version: 7.1.20
Laravel Version: 5.7
Update
Turns out the issue is actually with this line;
$event->push();
Could there be something recursive happening here?
Update 2
With Namoshek's help, I can now narrow it down to the following error from xdebug;
Maximum function nesting level of '256' reached, aborting!
Increasing xdebug.max_nesting_level to 200000 brings back the segfault.
This seems to me like it's stuck in an infinite loop. However, I can't see how calling save() or push() in created would end up calling back to itself. Confused.

Answer 1

This did indeed turn out to be an infinite recursion issue. Eliminating the line:
$event->push(); // this line appears to call update again, which in turn calls push, which calls update etc...
Solved the problem.