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5.3 merge
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@ -1648,7 +1648,7 @@ int DsMrr_impl::dsmrr_explain_info(uint mrr_mode, char *str, size_t size)
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uint used_str_len= strlen(used_str);
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uint copy_len= min(used_str_len, size);
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memcpy(str, used_str, size);
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memcpy(str, used_str, copy_len);
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return copy_len;
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}
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return 0;
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