Only allow a solver to be passed into solve, and not a model directly…

…. Tiny temporary hack so that SCSSolver will work and add symmetry constraints

src/solution.jl

@@ -2,10 +2,17 @@ import MathProgBase
 export solve!
 
 function solve!(problem::Problem,
-                m::MathProgBase.AbstractMathProgModel=get_default_solver();
+                s::MathProgBase.AbstractMathProgSolver=get_default_solver();
                 warmstart=true)
 
+  m = MathProgBase.model(s)
+  # TODO: This is a tiny, temporary hack that will be removed once SCS.jl or SCS
+  # starts to take care of symmetry constraints.
+  old_solver = get_default_solver()
+  set_default_solver(s)
   c, A, b, cones, var_to_ranges, vartypes = conic_problem(problem)
+  set_default_solver(old_solver)
+
   if problem.head == :maximize
     c = -c
   end
@@ -60,9 +67,6 @@ function solve!(problem::Problem,
   end
 end
 
-solve!(problem::Problem, m::MathProgBase.AbstractMathProgSolver) =
-  solve!(problem, MathProgBase.model(m))
-
 function populate_variables!(problem::Problem, var_to_ranges::Dict{Uint64, (Int64, Int64)})
   x = problem.solution.primal
   for (id, (start_index, end_index)) in var_to_ranges