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由 Junio C Hamano 提交于
When your refs are packed, "git-describe" can find the tag that is the best match without ever parsing the tag itself. But lookup_tag() in display_name() says "I've never seen it", creates an empty shell, and returns it. We need to make sure that we actually have parsed the tag data into it. Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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