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<?php class A { function foo() { $f = static function() { return $this; }; return $f(); } } class B extends A {} $b = new B; var_dump($b->foo());
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Using $this when not in object context in /in/bLXCX:5 Stack trace: #0 /in/bLXCX(7): A::{closure}() #1 /in/bLXCX(14): A->foo() #2 {main} thrown in /in/bLXCX on line 5
Process exited with code 255.

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