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<?php $x = NULL; empty($x['foo']->bar->k[$x['z']]); print "OK\n";
Output for git.master, git.master_jit
Warning: Trying to access array offset on value of type null in /in/ZQYIR on line 4 OK
Output for rfc.property-hooks
Warning: Trying to access array offset on null in /in/ZQYIR on line 4 OK

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