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<?php function a(&$a){$a = null;} $a = 1; var_dump($a += a($a)); var_dump($a); $b = 1; var_dump($b = $b + a($b)); var_dump($b);
Output for git.master, git.master_jit, rfc.property-hooks
int(0) int(0) int(0) int(0)

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