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<?php $r = array(); $r[] = 'a'; echo "" + $r;
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Unsupported operand types: string + array in /in/Yc0jH:7 Stack trace: #0 {main} thrown in /in/Yc0jH on line 7
Process exited with code 255.

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