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<?php $a['a'] = 1; $b = [2,3]; $a['a'] = array_merge($a['a'], $b); vat_dump($a['a']);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, int given in /in/KCpnj:6 Stack trace: #0 /in/KCpnj(6): array_merge(1, Array) #1 {main} thrown in /in/KCpnj on line 6
Process exited with code 255.

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