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由 Jeff King 提交于
Some callers may want to know more than just the integer error code we return. Let them optionally pass a slot_results struct to fill in (or NULL if they do not care). In either case we continue to return the integer code. We can also give probe_rpc the same treatment (since it builds directly on run_slot). Signed-off-by: NJeff King <peff@peff.net>
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