Undefined behavior with SQLite transaction using a worker limit > 1

[matcracker]

Issue description

Using more than 1 worker with SQLite causes strange behavior with transactions.

Steps to reproduce the issue

1. Set the worker-limit to 2
2. Wait different minutes because the SQLiteTransaction task need to be executed.

OS and versions

• BedcoreProtect: 0.6.0

• PocketMine-MP: 3.12.1
• PHP: 7.3
• Server OS: Win10
• Game version: PE/Win10 (delete as appropriate)

Crashdump, backtrace or other files

2020-05-16 [01:50:23] [Server thread/CRITICAL]: matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\AwaitException: "Unhandled async exception" (EXCEPTION) in "plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await" at line 377
2020-05-16 [01:50:23] [Server thread/DEBUG]: #0 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(143): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->reject(object matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #1 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(117): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->wakeup(object Closure)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #2 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(338): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->wakeupFlat(object Closure)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #3 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/AwaitChild(48): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->recheckPromiseQueue(object matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\AwaitChild)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #4 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(373): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\AwaitChild->reject(object matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #5 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(143): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->reject(object matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #6 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(117): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->wakeup(object Closure)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #7 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/Await(338): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->wakeupFlat(object Closure)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #8 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/SOFe/AwaitGenerator/AwaitChild(48): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\Await->recheckPromiseQueue(object matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\AwaitChild)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #9 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/base/DataConnectorImpl(240): matcracker\BedcoreProtect\libs\SOFe\AwaitGenerator\AwaitChild->reject(object matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError, NULL )
2020-05-16 [01:50:23] [Server thread/DEBUG]: #10 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/base/DataConnectorImpl(186): matcracker\BedcoreProtect\libs\poggit\libasynql\base\DataConnectorImpl->reportError(array[2], object matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError, NULL )
2020-05-16 [01:50:23] [Server thread/DEBUG]: #11 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/base/SqlThreadPool(112): matcracker\BedcoreProtect\libs\poggit\libasynql\base\DataConnectorImpl->matcracker\BedcoreProtect\libs\poggit\libasynql\base\{closure}(object matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #12 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/base/DataConnectorImpl(268): matcracker\BedcoreProtect\libs\poggit\libasynql\base\SqlThreadPool->readResults(array[17428])
2020-05-16 [01:50:23] [Server thread/DEBUG]: #13 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/base/SqlThreadPool(65): matcracker\BedcoreProtect\libs\poggit\libasynql\base\DataConnectorImpl->checkResults()
2020-05-16 [01:50:23] [Server thread/DEBUG]: #14 vendor/pocketmine/snooze/src/SleeperHandler(123): matcracker\BedcoreProtect\libs\poggit\libasynql\base\SqlThreadPool->matcracker\BedcoreProtect\libs\poggit\libasynql\base\{closure}()
2020-05-16 [01:50:23] [Server thread/DEBUG]: #15 vendor/pocketmine/snooze/src/SleeperHandler(85): pocketmine\snooze\SleeperHandler->processNotifications()
2020-05-16 [01:50:23] [Server thread/DEBUG]: #16 src/pocketmine/Server(2146): pocketmine\snooze\SleeperHandler->sleepUntil(double 1589583023.4922)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #17 src/pocketmine/Server(1990): pocketmine\Server->tickProcessor()
2020-05-16 [01:50:23] [Server thread/DEBUG]: #18 src/pocketmine/Server(1584): pocketmine\Server->start()
2020-05-16 [01:50:23] [Server thread/DEBUG]: #19 src/pocketmine/PocketMine(272): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[17] /home/admin/mcpe/, string[25] /home/admin/mcpe/plugins/)
2020-05-16 [01:50:23] [Server thread/DEBUG]: #20 src/pocketmine/PocketMine(295): pocketmine\server()
2020-05-16 [01:50:23] [Server thread/DEBUG]: #21 (11): require(string[72] phar:///home/admin/mcpe/PocketMine-MP.phar/src/pocketmine/PocketMine.php)
2020-05-16 [01:50:23] [Server thread/DEBUG]: Previous: matcracker\BedcoreProtect\libs\poggit\libasynql\SqlError: "SQL EXECUTION error: cannot commit - no transaction is active, for query END TRANSACTION; | []" (EXCEPTION) in "plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/sqlite3/Sqlite3Thread" at line 91
2020-05-16 [01:50:23] [Server thread/DEBUG]:   #0 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/libs/poggit/libasynql/base/SqlSlaveThread(85): matcracker\BedcoreProtect\libs\poggit\libasynql\sqlite3\Sqlite3Thread->executeQuery(string[15] object(SQLite3), integer 0, string[16] END TRANSACTION;, array[0])
2020-05-16 [01:50:23] [Server thread/DEBUG]:   #1 (): matcracker\BedcoreProtect\libs\poggit\libasynql\base\SqlSlaveThread->run()
2020-05-16 [01:50:23] [Server thread/DEBUG]:   #2 Internal(0): Corrected generator stack trace()
2020-05-16 [01:50:23] [Server thread/DEBUG]:   #3 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/storage/queries/Query(118): executeGeneric()
2020-05-16 [01:50:23] [Server thread/DEBUG]:   #4 plugins/BedcoreProtect.phar/src/matcracker/BedcoreProtect/storage/queries/PluginQueries(134): matcracker\BedcoreProtect\storage\queries\{closure}()