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<?php $data = "[data-val='21']"; vprintf("(%d)-%d-%d"); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: vprintf() expects exactly 2 arguments, 1 given in /in/7FiAl:4 Stack trace: #0 /in/7FiAl(4): vprintf('(%d)-%d-%d') #1 {main} thrown in /in/7FiAl on line 4
Process exited with code 255.

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