lightdark example doesn't work

[rejuvyesh]

Adding following to

https://github.com/JuliaPOMDP/QuickPOMDPs.jl/blob/master/examples/lightdark.jl

doesn't work:

using POMDPs
using QMDP

solver = QMDPSolver()
solve(solver, simple_lightdark)

This results into:

CLICK ME

ERROR: MethodError: no method matching (::var"#4#8")(::Int64, ::Int64, ::Int64)
Closest candidates are:
  (::var"#4#8")(::Any, ::Any, ::Any, ::Any) at /mnt/tools/julia/dev/QuickPOMDPs/examples/lightdark.jl:29
Stacktrace:
 [1] reward(::QuickPOMDP{UUID("72444244-debf-4773-8f29-ac07a76d1d95"), Int64, Int64, Float64, NamedTuple{(:stateindex, :isterminal, :states, :discount, :actions, :obstype, :observation, :actionindex, :transition, :reward, :initialstate), Tuple{Dict{Int64, Int64}, var"#1#5", UnitRange{Int64}, Float64, Vector{Int64}, DataType, var"#3#7", Dict{Int64, Int64}, var"#2#6", var"#4#8", POMDPModelTools.Uniform{Set{Int64}}}}}, ::Int64, ::Int64, ::Int64)
   @ QuickPOMDPs /mnt/tools/julia/dev/QuickPOMDPs/src/quick.jl:252
 [2] reward(mdp::UnderlyingMDP{QuickPOMDP{UUID("72444244-debf-4773-8f29-ac07a76d1d95"), Int64, Int64, Float64, NamedTuple{(:stateindex, :isterminal, :states, :discount, :actions, :obstype, :observation, :actionindex, :transition, :reward, :initialstate), Tuple{Dict{Int64, Int64}, var"#1#5", UnitRange{Int64}, Float64, Vector{Int64}, DataType, var"#3#7", Dict{Int64, Int64}, var"#2#6", var"#4#8", POMDPModelTools.Uniform{Set{Int64}}}}}, Int64, Int64}, s::Int64, a::Int64, sp::Int64)
   @ POMDPModelTools ~/.julia/packages/POMDPModelTools/PYObx/src/underlying_mdp.jl:26
 [3] macro expansion
   @ ~/.julia/packages/DiscreteValueIteration/FjeJj/src/vanilla.jl:120 [inlined]
 [4] macro expansion
   @ ./timing.jl:287 [inlined]
 [5] solve(solver::DiscreteValueIteration.ValueIterationSolver, mdp::UnderlyingMDP{QuickPOMDP{UUID("72444244-debf-4773-8f29-ac07a76d1d95"), Int64, Int64, Float64, NamedTuple{(:stateindex, :isterminal, :states, :discount, :actions, :obstype, :observation, :actionindex, :transition, :reward, :initialstate), Tuple{Dict{Int64, Int64}, var"#1#5", UnitRange{Int64}, Float64, Vector{Int64}, DataType, var"#3#7", Dict{Int64, Int64}, var"#2#6", var"#4#8", POMDPModelTools.Uniform{Set{Int64}}}}}, Int64, Int64}; kwargs::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
   @ DiscreteValueIteration ~/.julia/packages/DiscreteValueIteration/FjeJj/src/vanilla.jl:102
 [6] solve
   @ ~/.julia/packages/DiscreteValueIteration/FjeJj/src/vanilla.jl:67 [inlined]
 [7] solve(solver::QMDPSolver{DiscreteValueIteration.ValueIterationSolver}, pomdp::QuickPOMDP{UUID("72444244-debf-4773-8f29-ac07a76d1d95"), Int64, Int64, Float64, NamedTuple{(:stateindex, :isterminal, :states, :discount, :actions, :obstype, :observation, :actionindex, :transition, :reward, :initialstate), Tuple{Dict{Int64, Int64}, var"#1#5", UnitRange{Int64}, Float64, Vector{Int64}, DataType, var"#3#7", Dict{Int64, Int64}, var"#2#6", var"#4#8", POMDPModelTools.Uniform{Set{Int64}}}}})
   @ QMDP ~/.julia/packages/QMDP/N6dCz/src/vanilla.jl:34
 [8] top-level scope
   @ REPL[7]:1

[rejuvyesh]

 reward = function (s, a, sp)
        if a == 0
            return s == 0 ? 100 : -100
        else
            return -1.0
        end
    end,

fixes the error.

[zsunberg]

Fixed with a56b986