The linprog function of MATLAB 2018b can not return solution which can exceeds the upper bound if no solution satisfies the lower and upper bound

The linprog function of MATLAB 2018b can not return solution which can exceeds the upper bound if no solution satisfies the lower and upper bound, however, the function in MATLAB 2012b can find a solution which exceeds the upper bound. We prefer to use MATLAB 2012b in our program because it is more important to obtain a solution. We can change parameters based on the solution returned so that the solution satisfying the lower and upper bound can be got. Therefore, we believe that the change of the linprog function maybe not suitable in the new version.