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<?php $a=["a","b","c"]; $b=["uu","yy","zz"]; $c=array_merge($a,$b); array_r($c);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function array_r() in /in/LOZKJ:6 Stack trace: #0 {main} thrown in /in/LOZKJ on line 6
Process exited with code 255.

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