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<?php class foo { function bar() { $x = array(); echo $x[self::xx]; } } $a = new foo; $a->bar();
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant foo::xx in /in/9D5br:5 Stack trace: #0 /in/9D5br(10): foo->bar() #1 {main} thrown in /in/9D5br on line 5
Process exited with code 255.

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