If I move a pair into a map, but the insert failed because the key already exists, can I safely use the pair afterwards?

//objects available: map, pair

auto insert_pair = map.insert(std::move(pair));

if (!insert_pair.second)
{
  //can I safely access pair here?
}

Has this been documented in the standard?

c++ c++11 dictionary move-semantics std-pair
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