Examples are failing CI

[mlubin]

https://travis-ci.org/JuliaOpt/JuMP.jl/jobs/573462747#L351

  LoadError: MethodError: MathOptInterface.Utilities.load_constraint(::SCS.Optimizer, ::MathOptInterface.ConstraintIndex{MathOptInterface.VectorOfVariables,MathOptInterface.PositiveSemidefiniteConeTriangle}, ::MathOptInterface.VectorOfVariables, ::MathOptInterface.PositiveSemidefiniteConeTriangle) is ambiguous. Candidates:
    load_constraint(optimizer::SCS.Optimizer, ci, f::MathOptInterface.VectorOfVariables, s) in SCS at /home/travis/.julia/packages/SCS/L1XbN/src/MOI_wrapper.jl:230
    load_constraint(model::MathOptInterface.ModelLike, ::MathOptInterface.ConstraintIndex, func::MathOptInterface.AbstractFunction, set::MathOptInterface.AbstractSet) in MathOptInterface.Utilities at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/copy.jl:592
  Possible fix, define
    load_constraint(::SCS.Optimizer, ::MathOptInterface.ConstraintIndex, ::MathOptInterface.VectorOfVariables, ::MathOptInterface.AbstractSet)
  Stacktrace:
   [1] load_constrained_variables(::SCS.Optimizer, ::Array{MathOptInterface.VariableIndex,1}, ::MathOptInterface.ConstraintIndex{MathOptInterface.VectorOfVariables,MathOptInterface.PositiveSemidefiniteConeTriangle}, ::MathOptInterface.PositiveSemidefiniteConeTriangle) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/copy.jl:463
   [2] load_vector_of_variables(::SCS.Optimizer, ::MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}, ::MathOptInterface.Utilities.IndexMap, ::Array{MathOptInterface.ConstraintIndex{MathOptInterface.VectorOfVariables,MathOptInterface.PositiveSemidefiniteConeTriangle},1}) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/copy.jl:581
   [3] allocate_load(::SCS.Optimizer, ::MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}, ::Bool) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/copy.jl:676
   [4] #automatic_copy_to#89 at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/copy.jl:17 [inlined]
   [5] #automatic_copy_to at ./none:0 [inlined]
   [6] #copy_to#27 at /home/travis/.julia/packages/SCS/L1XbN/src/MOI_wrapper.jl:95 [inlined]
   [7] #copy_to at ./none:0 [inlined]
   [8] attach_optimizer(::MathOptInterface.Utilities.CachingOptimizer{SCS.Optimizer,MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}}) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/cachingoptimizer.jl:138
   [9] optimize!(::MathOptInterface.Utilities.CachingOptimizer{SCS.Optimizer,MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}}) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/cachingoptimizer.jl:174
   [10] optimize!(::MathOptInterface.Bridges.LazyBridgeOptimizer{MathOptInterface.Utilities.CachingOptimizer{SCS.Optimizer,MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}}}) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Bridges/bridge_optimizer.jl:139
   [11] optimize!(::MathOptInterface.Utilities.CachingOptimizer{MathOptInterface.AbstractOptimizer,MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}}) at /home/travis/.julia/packages/MathOptInterface/mvlGI/src/Utilities/cachingoptimizer.jl:178
   [12] #optimize!#78(::Bool, ::Bool, ::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Model, ::Nothing) at /home/travis/.julia/packages/JuMP/LfUs7/src/optimizer_interface.jl:141
   [13] optimize! at /home/travis/.julia/packages/JuMP/LfUs7/src/optimizer_interface.jl:111 [inlined] (repeats 2 times)
   [14] #example_cluster#7(::Bool, ::Function) at /home/travis/build/JuliaOpt/JuMP.jl/examples/cluster.jl:47
   [15] (::getfield(Main, Symbol("#kw##example_cluster")))(::NamedTuple{(:verbose,),Tuple{Bool}}, ::typeof(example_cluster)) at ./none:0
   [16] top-level scope at none:0
   [17] include at ./boot.jl:317 [inlined]
   [18] include_relative(::Module, ::String) at ./loading.jl:1044
   [19] include(::Module, ::String) at ./sysimg.jl:29
   [20] include(::String) at ./client.jl:392
   [21] macro expansion at /home/travis/build/JuliaOpt/JuMP.jl/examples/run_examples.jl:21 [inlined]
   [22] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1156 [inlined]
   [23] macro expansion at /home/travis/build/JuliaOpt/JuMP.jl/examples/run_examples.jl:20 [inlined]
   [24] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
   [25] top-level scope at /home/travis/build/JuliaOpt/JuMP.jl/examples/run_examples.jl:20
   [26] include at ./boot.jl:317 [inlined]
   [27] include_relative(::Module, ::String) at ./loading.jl:1044
   [28] include(::Module, ::String) at ./sysimg.jl:29
   [29] exec_options(::Base.JLOptions) at ./client.jl:266
   [30] _start() at ./client.jl:425
  in expression starting at /home/travis/build/JuliaOpt/JuMP.jl/examples/cluster.jl:82

[blegat]

SCS v0.6 needs to be tagged. SCS v0.5 was using REQUIRE so it seems the upper bound wasn't set correctly similarly to JuMP v0.19: JuliaRegistries/General#2684

[mlubin]

@blegat is there anything blocking the SCS 0.6 release? Looks like the MOI 0.9 PR was merged.

[blegat]

SCS v0.6.0 is now released and jump-dev/MathOptInterface.jl#850 fixed the MLE example.