julia> test()
ERROR: In `@constraint(model, ind, ind_fun in ind_set)`: unable to add the constraint because we don't recognize MathOptInterface.VectorAffineFunction{Float64}(MathOptInterface.VectorAffineTerm{Float64}[VectorAffineTerm{Float64}(1, ScalarAffineTerm{Float64}(1.0, VariableIndex(3))), VectorAffineTerm{Float64}(2, ScalarAffineTerm{Float64}(0.2, VariableIndex(1))), VectorAffineTerm{Float64}(2, ScalarAffineTerm{Float64}(1.0, VariableIndex(2)))], [0.0, 0.0]) as a valid JuMP function.
Stacktrace:
 [1] error(::String, ::String) at ./error.jl:42
 [2] _macro_error(::Symbol, ::Array{Any,1}, ::String) at /home/rs/.julia/packages/JuMP/iGamg/src/macros.jl:1091
 [3] (::getfield(JuMP, Symbol("#_error#55")){Symbol})(::String) at /home/rs/.julia/packages/JuMP/iGamg/src/macros.jl:565
 [4] build_constraint(::getfield(JuMP, Symbol("#_error#55")){Symbol}, ::MathOptInterface.VectorAffineFunction{Float64}, ::MathOptInterface.IndicatorSet{ACTIVATE_ON_ONE::ActivationCondition = 1,MathOptInterface.LessThan{Float64}}) at /home/rs/.julia/packages/JuMP/iGamg/src/macros.jl:462
 [5] macro expansion at /home/rs/.julia/packages/JuMP/iGamg/src/macros.jl:619 [inlined]
 [6] test() at /home/rs/scratch.jl:27
 [7] top-level scope at none:0