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<?php function foo(callable $bar) { throw new \Exception; } try { foo(fn($_) => $_); } catch (\Throwable $e) { var_dump(serialize($e)); }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Exception: Serialization of 'Closure' is not allowed in /in/tv1s1:11 Stack trace: #0 /in/tv1s1(11): serialize(Object(Exception)) #1 {main} thrown in /in/tv1s1 on line 11
Process exited with code 255.

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