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fuelphpでpackageをいじっていたら、Exception thrown without a stack frame in Unknown on line 0が出た

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fuelphpで、ちょっとカスタムを試したくて
packageの中で Config::get('db'); をしてみたら
Exception thrown without a stack frame in Unknown on line 0
が発生しました。

結論を言うとConfigから取得した値を、arrayキャストをすることで治りました。

状況は、
こんな感じの処理を書いていたんですが

orm/classes/model.php
$dbs = Config::load(’db');
if(is_array($dbs)) {
  foreach($dbs AS $db)
  {
  }
}

$dbsを取ってくるまでは問題がないのに、foreachを書くと上記エラーが発生。
is_arrayをかけてチェックをしているのに、エラーが出ます。

いろいろ試した結果、以下の感じで、arrayキャストかけたら治りました。

orm/classes/model.php
$dbs = Config::load(’db');
if(is_array($dbs)) {
  foreach((array)$dbs AS $db)
  {
  }
}
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