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<?php spl_autoload_register('some_unknown_function',false); class_exists('AutoloadedClass');
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: spl_autoload_register(): Argument #1 ($callback) must be a valid callback or null, function "some_unknown_function" not found or invalid function name in /in/Fj7I1:3 Stack trace: #0 /in/Fj7I1(3): spl_autoload_register('some_unknown_fu...', false) #1 {main} thrown in /in/Fj7I1 on line 3
Process exited with code 255.

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