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<?php new class { public string $string = "hai"; public function __construct(){ echo $this->string += 10; } };
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/Yo9QU:6 Stack trace: #0 /in/Yo9QU(2): class@anonymous->__construct() #1 {main} thrown in /in/Yo9QU on line 6
Process exited with code 255.

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