A few bugs not fixed

[odow]

julia> model = Model()
A JuMP Model
Feasibility problem with:
Variables: 0
Model mode: AUTOMATIC
CachingOptimizer state: NO_OPTIMIZER
Solver name: No optimizer attached.

julia> @variable(model, p == 1, Param())
p

julia> @variable(model, x)
x

julia> @expression(model, ex, 1 * p)
p

julia> @constraint(model, ex <= 0)
ERROR: MethodError: no method matching shift_constant(::MathOptInterface.LessThan{Float64}, ::Int64)
Closest candidates are:
  shift_constant(::Union{MathOptInterface.EqualTo{T}, MathOptInterface.GreaterThan{T}, MathOptInterface.LessThan{T}}, ::T) where T at /Users/oscar/.julia/packages/MathOptInterface/5WwpK/src/Utilities/sets.jl:13
  shift_constant(::MathOptInterface.Interval, ::Any) at /Users/oscar/.julia/packages/MathOptInterface/5WwpK/src/Utilities/sets.jl:19
  shift_constant(::MathOptInterface.Test.UnknownScalarSet, ::Any) at /Users/oscar/.julia/packages/MathOptInterface/5WwpK/src/Test/modellike.jl:8
Stacktrace:
 [1] build_constraint(::Function, ::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::MathOptInterface.LessThan{Float64}) at /Users/oscar/.julia/dev/ParameterJuMP/src/constraints.jl:162
 [2] top-level scope at /Users/oscar/.julia/packages/JuMP/y5vgk/src/macros.jl:448
 [3] top-level scope at REPL[180]:1

julia> @constraint(model, ex <= x)
ERROR: MethodError: no method matching +(::GenericAffExpr{Float64,VariableRef}, ::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef})
Closest candidates are:
  +(::Any, ::Any, ::Any, ::Any...) at operators.jl:538
  +(::ChainRulesCore.DoesNotExist, ::Any) at /Users/oscar/.julia/packages/ChainRulesCore/7d1hl/src/differential_arithmetic.jl:23
  +(::MutableArithmetics.Zero, ::Any) at /Users/oscar/.julia/packages/MutableArithmetics/bPWR4/src/rewrite.jl:52
  ...
Stacktrace:
 [1] -(::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::VariableRef) at /Users/oscar/.julia/dev/ParameterJuMP/src/operators.jl:122
 [2] sub_mul(::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::VariableRef) at /Users/oscar/.julia/packages/MutableArithmetics/bPWR4/src/MutableArithmetics.jl:31
 [3] operate(::typeof(MutableArithmetics.sub_mul), ::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::VariableRef) at /Users/oscar/.julia/packages/MutableArithmetics/bPWR4/src/interface.jl:110
 [4] operate_fallback!(::MutableArithmetics.NotMutable, ::Function, ::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::VariableRef) at /Users/oscar/.julia/packages/MutableArithmetics/bPWR4/src/interface.jl:327
 [5] operate!(::typeof(MutableArithmetics.sub_mul), ::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::VariableRef) at /Users/oscar/.julia/packages/MutableArithmetics/bPWR4/src/rewrite.jl:80
 [6] top-level scope at /Users/oscar/.julia/packages/MutableArithmetics/bPWR4/src/rewrite.jl:276
 [7] top-level scope at /Users/oscar/.julia/packages/JuMP/y5vgk/src/macros.jl:447
 [8] top-level scope at REPL[181]:1

julia> @constraint(model, x - ex <= 0)
ERROR: MethodError: no method matching shift_constant(::MathOptInterface.LessThan{Float64}, ::Int64)
Closest candidates are:
  shift_constant(::Union{MathOptInterface.EqualTo{T}, MathOptInterface.GreaterThan{T}, MathOptInterface.LessThan{T}}, ::T) where T at /Users/oscar/.julia/packages/MathOptInterface/5WwpK/src/Utilities/sets.jl:13
  shift_constant(::MathOptInterface.Interval, ::Any) at /Users/oscar/.julia/packages/MathOptInterface/5WwpK/src/Utilities/sets.jl:19
  shift_constant(::MathOptInterface.Test.UnknownScalarSet, ::Any) at /Users/oscar/.julia/packages/MathOptInterface/5WwpK/src/Test/modellike.jl:8
Stacktrace:
 [1] build_constraint(::Function, ::ParameterJuMP.DoubleGenericAffExpr{Int64,VariableRef,ParameterRef}, ::MathOptInterface.LessThan{Float64}) at /Users/oscar/.julia/dev/ParameterJuMP/src/constraints.jl:162
 [2] top-level scope at /Users/oscar/.julia/packages/JuMP/y5vgk/src/macros.jl:448
 [3] top-level scope at REPL[182]:1