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<?php class Foo implements IteratorAggregate { protected $attributes = []; function __construct(array $arr) { $this->attributes = $arr; } function getIterator(): \Traversable { return new ArrayIterator($this->attributes); } } (new Foo([]))[0];
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Cannot use object of type Foo as array in /in/hIimN:18 Stack trace: #0 {main} thrown in /in/hIimN on line 18
Process exited with code 255.

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