Fix

Author: blegat

src/Utilities/mockoptimizer.jl

@@ -182,7 +182,7 @@ function MOI.add_constraint(
     if !mock.add_con_allowed
         throw(MOI.AddConstraintNotAllowed{typeof(func),typeof(set)}())
     elseif mock.scalar_function_constant_non_zero
-        MOI.throw_if_scalar_and_constant_not_zero(func, typeof(S))
+        MOI.throw_if_scalar_and_constant_not_zero(func, typeof(set))
     end
     ci = MOI.add_constraint(mock.inner_model, xor_indices(func), set)
     return xor_index(ci)