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<?php function foo(callable $arg) : callable { return $arg; } function bar() : callable { return 'hello'; } foo('hello')(); bar('hello')();
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: foo(): Argument #1 ($arg) must be of type callable, string given, called in /in/83og5 on line 11 and defined in /in/83og5:3 Stack trace: #0 /in/83og5(11): foo('hello') #1 {main} thrown in /in/83og5 on line 3
Process exited with code 255.

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