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<?php class A { function __toString() { return "A"; } } $a = new a; $b = [$a => $a]; //Illegal offset type print_r($b);
Output for git.master, git.master_jit
Fatal error: Uncaught TypeError: Cannot access offset of type A on array in /in/CfEaW:11 Stack trace: #0 {main} thrown in /in/CfEaW on line 11
Process exited with code 255.

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