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<?php $a = 'BIT'; debug_zval_dump($a); $b=$a; debug_zval_dump($a);
Output for git.master, rfc.property-hooks
string(3) "BIT" interned string(3) "BIT" interned
Output for git.master_jit
string(3) "BIT" refcount(3) string(3) "BIT" refcount(4)

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