Oh fuck me, OPcache

Ok, computer
[jit] => Array
        (
            [enabled] => 1
            [on] => 1
            [kind] => 5
            [opt_level] => 4
            [opt_flags] => 6
            [buffer_size] => 3145712
            [buffer_free] => 2062640
        )

What is that? This is a portion of opcache_get_status() output from one of our server when we run stable for a lot more than 24hrs. But what happens when we lover a opcache.jit_buffer_size to 2M? From a basic math you would think that “oh, cool, we’ve freed another M for some other stuff, hooray”. Nope. That server crashed. Do you have any idea of why?