Description:
------------
We try to run a Symfony based project and have some controllers with PHP8 annotations. But it crashes with a segmentation fault.



(gdb) run bin/console ca:c
Starting program: /usr/local/bin/php bin/console ca:c
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

 // Clearing the cache for the prod environment with debug false                                                        

Program received signal SIGSEGV, Segmentation fault.
0x00005555559a120b in zend_observer_fcall_end ()
(gdb) bt
#0  0x00005555559a120b in zend_observer_fcall_end ()
#1  0x0000555555974eca in execute_ex ()
#2  0x00005555559076ba in zend_call_function ()
#3  0x0000555555907af5 in zend_call_known_function ()
#4  0x00005555557d0010 in ?? ()
#5  0x00005555556343e5 in ?? ()
#6  0x000055555597ceed in execute_ex ()
#7  0x0000555555990a02 in zend_generator_resume ()
#8  0x0000555555991449 in ?? ()
#9  0x000055555593bd72 in ?? ()
#10 0x0000555555944773 in ?? ()
#11 0x00005555559752b7 in execute_ex ()
#12 0x000055555597d0fe in zend_execute ()
#13 0x0000555555914e5d in zend_execute_scripts ()
#14 0x00005555558b22ae in php_execute_script ()
#15 0x00005555559a2aae in ?? ()
#16 0x000055555563dbcb in ?? ()
#17 0x00007ffff700709b in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#18 0x000055555563e30a in _start ()

I traced it down and the root case is this line:

https://github.com/symfony/symfony/blob/5.4/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php#L376

The constructor of https://github.com/symfony/symfony/blob/5.4/src/Symfony/Component/Routing/Route.php#L53 is called with 

array(8) {
  [0]=>
  array(7) {
    ["path"]=>
    string(25) "/api/customer-prices/sync"
    ["name"]=>
    string(26) "api.onedrop.customerprices"
    ["requirements"]=>
    array(0) {
    }
    ["options"]=>
    array(0) {
    }
    ["defaults"]=>
    array(0) {
    }
    ["methods"]=>
    array(1) {
      [0]=>
      string(4) "POST"
    }
    ["schemes"]=>
    array(0) {
    }
  }
  [1]=>
  string(25) "/api/customer-prices/sync"
  [2]=>
  string(26) "api.onedrop.customerprices"
  [3]=>
  array(0) {
  }
  [4]=>
  array(0) {
  }
  [5]=>
  array(0) {
  }
  [6]=>
  NULL
  [7]=>
  array(1) {
    [0]=>
    string(4) "POST"
  }
}

and finishes execution and then the segmentation fault happens. So maybe it's the yield at that point.