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<?php $string = 'Hello World!'; var_dump($string); $string[5] = null; var_dump($string);
Output for git.master, git.master_jit, rfc.property-hooks
string(12) "Hello World!" Fatal error: Uncaught Error: Cannot assign an empty string to a string offset in /in/tmB0e:4 Stack trace: #0 {main} thrown in /in/tmB0e on line 4
Process exited with code 255.

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