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<?php var_dump(count(new CallbackFilterIterator(new ArrayIterator([1,2,3,4]), function ($i) { return $i % 2 === 0; })));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, CallbackFilterIterator given in /in/WRNHU:3 Stack trace: #0 {main} thrown in /in/WRNHU on line 3
Process exited with code 255.

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