The compilation error:
error: default initialization of an object of const type 'const std::vector<MeshLib::Element *>' without a user-provided
      default constructor

is produced by clang-3.6.0, which is correct for the current standard, but will be corrected later as described in
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#253

In gcc-5.1.0 this is only a warning.