G2O BlockSolver Initialization Crash on Unix System

I have a project which possesses and uses G2O library, it runs on both platforms(win/Unix).

(WINDOW PASSED / UNIX CRASHED)

We can see in both platforms, these lines:

g2o::SparseOptimizer optimizer;
g2o::BlockSolver_6_3::LinearSolverType * linearSolver;

linearSolver = new g2o::LinearSolverDense<g2o::BlockSolver_6_3::PoseMatrixType>();

Next steps, in window os we have this:

g2o::BlockSolver_6_3 * solver_ptr = new g2o::BlockSolver_6_3(linearSolver);
g2o::OptimizationAlgorithmLevenberg* solver = new g2o::OptimizationAlgorithmLevenberg(solver_ptr);

But Unix system can't compile those lines because it says

my_file_G2o.cpp: *In member function 'int Refiner_G2O::refinePose(cv::Mat&, const std::vector >&, const std::vector&, const cv::Mat&, float, std::vector&)': my_file_G2o.cpp --> no matching function for call to 'g2o::BlockSolver::BlockSolver(g2o::BlockSolver::LinearSolverType&)'* ^ In file included from G2o/include/g2o/core/block_solver.h:199:0, G2o/include/g2o/core/block_solver.hpp:40:1: note: candidate: g2o::BlockSolver::BlockSolver(std::unique_ptr) [with Traits = g2o::BlockSolverTraits<6, 3>; typename Traits::LinearSolverType = g2o::LinearSolver >] BlockSolver::BlockSolver(std::unique_ptr linearSolver)

When I see these errors, I complete my Unix code with this new block

auto solver_ptr = g2o::make_unique<g2o::BlockSolver_6_3>(linearSolver); // [SEGFAULT LINE]
auto solver = g2o::make_unique<g2o::OptimizationAlgorithmLevenberg>(solver_ptr);
optimizer.setAlgorithm(solver.get());

So now, I can build/run but I meet a segfault on the line with [SEGFAULT LINE] tag.

I don't understand, why? if someone has an idea I want to understand how in Window it works and not in Unix system, will feel wonderful if you help.

LINUX Version: Ubuntu 16.04
CMAKE Version: 3.11.4

Best regards,