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<?php function test(string $a): string { return round($a, 2); } var_dump(test($a));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $a in /in/GFk8r on line 5 Fatal error: Uncaught TypeError: test(): Argument #1 ($a) must be of type string, null given, called in /in/GFk8r on line 5 and defined in /in/GFk8r:3 Stack trace: #0 /in/GFk8r(5): test(NULL) #1 {main} thrown in /in/GFk8r on line 3
Process exited with code 255.

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