More ThreadSafeArray segfaults

[JaxkDev]

Look who's backkkkk, I hate threads 🥲😭

Environment

• PHP: PHP 8.2.8 (cli) (built: Aug 22 2023 00:59:03) (ZTS DEBUG)
• pthreads: Version => 6.0.8
• OS: Mac M1
• OPcache: no
• JIT: n/a

Reproducing Code

<?php

use pmmp\thread\Thread;
use pmmp\thread\ThreadSafeArray;

class testThread extends Thread{

    private ThreadSafeArray $config;

    public function __construct(ThreadSafeArray $config){
        $this->config = $config;
    }

    public function getConfig(): array{
        return (array)$this->config;
    }

    public function run(): void{
        var_dump($this->getConfig()['protocol']["INVALID_KEYgeneral"]); //UNKNOWN:0
        var_dump($this->getConfig()['protocol']["INVALID_KEYgeneral"][0]); //segfault
    }
}

(new testThread(ThreadSafeArray::fromArray(["protocol" => []])))->start(Thread::INHERIT_ALL);

Expected Output

Unknown

Actual Output

See comments.

Warning: PHP Startup: Invalid date.timezone value 'BST', using 'UTC' instead in Unknown on line 0
UNKNOWN:0
Process 86263 stopped
* thread #4, stop reason = EXC_BAD_ACCESS (code=1, address=0x8)
    frame #0: 0x0000000100934770 php`zval_undefined_cv(var=96, execute_data=0x0000000104414020) at zend_execute.c:270:21
   267  static zend_never_inline ZEND_COLD zval* zval_undefined_cv(uint32_t var EXECUTE_DATA_DC)
   268  {
   269          if (EXPECTED(EG(exception) == NULL)) {
-> 270                  zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
   271                  zend_error(E_WARNING, "Undefined variable $%s", ZSTR_VAL(cv));
   272          }
   273          return &EG(uninitialized_zval);
Target 0: (php) stopped.

Extras

(lldb) bt
* thread #4, stop reason = EXC_BAD_ACCESS (code=1, address=0x8)
  * frame #0: 0x0000000100934770 php`zval_undefined_cv(var=96, execute_data=0x0000000104414020) at zend_execute.c:270:21
    frame #1: 0x0000000100933cb4 php`_zval_undefined_op1(execute_data=0x0000000104414020) at zend_execute.c:278:9
    frame #2: 0x0000000100874978 php`zend_fetch_dimension_address_read(result=0x0000000104414070, container=0x0000000104414080, dim=0x00000001188bed20, dim_type=8, type=0, is_list=false, slow=1, execute_data=0x0000000104414020) at zend_execute.c:2757:16
    frame #3: 0x0000000100942258 php`zend_fetch_dimension_address_read_R_slow(container=0x0000000104414080, dim=0x00000001188bed20, opline=0x00000001188beec0, execute_data=0x0000000104414020) at zend_execute.c:2779:2
    frame #4: 0x000000010092f14c php`ZEND_FETCH_DIM_R_INDEX_SPEC_TMPVAR_CONST_HANDLER(execute_data=0x0000000104414020) at zend_vm_execute.h:16255:3
    frame #5: 0x0000000100879f98 php`execute_ex(ex=0x0000000104414020) at zend_vm_execute.h:55835:7
    frame #6: 0x00000001008141d4 php`zend_call_function(fci=0x000000016ff9ec10, fci_cache=0x000000016ff9ec50) at zend_execute_API.c:947:3
    frame #7: 0x000000010046cf54 php`pmmpthread_routine_run_function(connection=0x0000000104468100) at routine.c:68:5
    frame #8: 0x000000010046c820 php`pmmpthread_routine(routine=0x000000016fdfdf30) at routine.c:113:8
    frame #9: 0x00000001898bffa8 libsystem_pthread.dylib`_pthread_start + 148

(lldb) expr php_var_dump(&$var, 0);
array(1) {
 [0]=>
 array(4) {
   ["function"]=>
   string(3) "run"
   ["class"]=>
   string(10) "testThread"
   ["type"]=>
   string(2) "->"
   ["args"]=>
   array(0) {
   }
 }
}

[JaxkDev]

Note I thought this was resolved as similar issue to #125