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<?php function foo(): null { $a = 42; } var_dump(foo());
Output for git.master_jit, git.master
Fatal error: Uncaught TypeError: foo(): Return value must be of type null, none returned in /in/Y9ZCO:5 Stack trace: #0 /in/Y9ZCO(7): foo() #1 {main} thrown in /in/Y9ZCO on line 5
Process exited with code 255.

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