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<?php declare(strict_types = 1); $a = []; $a[-4] = 1; $a[] = 2; print_r($a); $a = [-4 => 1]; $a[] = 2; print_r($a);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [-4] => 1 [-3] => 2 ) Array ( [-4] => 1 [-3] => 2 )

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