raducorcan has created Issue #2959: Memory leak when setting nested keys using dot notation in laravel-mongodb. This Jira ticket was filed by GromNaN

Issue Text:

• Laravel-mongodb Version: 4.3.0
• PHP Version: 8.3
• Database Driver & Version: 1.15.0 & 5.0

Description:

There appears to be a memory leak when setting nested keys using dot notation. I am attaching a very simple code snippet that exemplifies the issue.

Steps to reproduce

```
class A extends \MongoDB\Laravel\Eloquent\Model {};

$a = new A;
for ($i = 0; $i < 100; $i++)

{ $a['somerandomkey'] = 42; echo (memory_get_usage() / (1024*1024) . "\n"); // this prints the same value in every iteration }

//----------------------------------

class A extends \MongoDB\Laravel\Eloquent\Model {};

$a = new A;
for ($i = 0; $i < 100; $i++)

{ $a['some.random.key'] = 42; echo (memory_get_usage() / (1024*1024) . "\n"); // this prints increasingly larger values }

```

Expected behaviour

Script memory usage keeps increasing.

Actual behaviour

The memory usage should remain constant.