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<?php namespace Foo; define('Foo\\null', 'hello'); if (isnull(null)) { echo "TRUE"; } else { echo "FALSE!!!"; }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function Foo\isnull() in /in/hoaYN:5 Stack trace: #0 {main} thrown in /in/hoaYN on line 5
Process exited with code 255.

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