Description:
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If i extend the SQLite3 class and overwrite it's constructor, then the call to the parent constructor (the constructor of SQLite3) will throw an Exception with the following error message: "Unable to open database: library routine called out of sequence".

Test script:
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class MySqlite extends \SQLite3 {

  function __construct(string $filename, int $flags = null, string $encryption_key) {
    parent::__construct($filename, $flags, $encryption_key);
    $this->enableExceptions(true);
    $this->busyTimeout(60000);
  }

}

$con = new MySqlite('file.sqlite3');