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@ -211,6 +211,9 @@ int dictExpand(dict *d, unsigned long size)
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if (dictIsRehashing(d) || d->ht[0].used > size)
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return DICT_ERR;
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/* Rehashing to the same table size is not useful. */
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if (realsize == d->ht[0].size) return DICT_ERR;
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/* Allocate the new hash table and initialize all pointers to NULL */
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n.size = realsize;
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n.sizemask = realsize-1;
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