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<?php $x = array(); var_dump(count($x['foo'])); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "foo" in /in/LMUDo on line 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/LMUDo:3 Stack trace: #0 {main} thrown in /in/LMUDo on line 3
Process exited with code 255.

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