View Compilation Error

0_0_21783378_16410.cpp: In function 'int main()':
0_0_21783378_16410.cpp:67:33: error: no matching function for call to 'std::multimap<int, int>::swap(std::multimap<int, int>)'
   oids.swap(multimap<int, int>());
                                 ^
0_0_21783378_16410.cpp:67:33: note: candidate is:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/map:62:0,
                 from 0_0_21783378_16410.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_multimap.h:723:7: note: void std::multimap<_Key, _Tp, _Compare, _Alloc>::swap(std::multimap<_Key, _Tp, _Compare, _Alloc>&) [with _Key = int; _Tp = int; _Compare = std::less<int>; _Alloc = std::allocator<std::pair<const int, int> >]
       swap(multimap& __x)
       ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_multimap.h:723:7: note:   no known conversion for argument 1 from 'std::multimap<int, int>' to 'std::multimap<int, int>&'