Squashed 'src/leveldb/' changes from 7924331..7d41e6f

7d41e6f Merge upstream LevelDB 1.18
803d692 Release 1.18

git-subtree-dir: src/leveldb
git-subtree-split: 7d41e6f89ff04ce9e6a742932924796f69c6e23d

table/format.cc

@@ -48,7 +48,7 @@ Status Footer::DecodeFrom(Slice* input) {
   const uint64_t magic = ((static_cast<uint64_t>(magic_hi) << 32) |
                           (static_cast<uint64_t>(magic_lo)));
   if (magic != kTableMagicNumber) {
-    return Status::InvalidArgument("not an sstable (bad magic number)");
+    return Status::Corruption("not an sstable (bad magic number)");
   }
 
   Status result = metaindex_handle_.DecodeFrom(input);