Variable scope in anonymous functions

[vivekbhattacharya]

I am confused about how Polyester handles arguments to anonymous functions. In short, why does the last example below not work?

function temp(x, y)
     return x + y
end

outputs = zeros(Float64, 100)

# This works
Polyester.@batch for i = 1:100
     myfunc = x -> temp(x, i)
     outputs[i] = myfunc(1)
end

# This also works
vals = collect(1:100)
Polyester.@batch for i = 1:100
     outputs[i] = 1 + vals[i]
end

# This does not
vals = collect(1:100)
Polyester.@batch for i = 1:100
     myfunc = x -> temp(x, vals[i])
     outputs[i] = myfunc(1)
end

Running it gives me the following error:

ERROR: UndefVarError: ##vals#373869 not defined
Stacktrace:
 [1] (::var"#183#186"{Int64})(x#373868::Int64)
   @ Main ./REPL[102]:2
 [2] macro expansion
   @ ./REPL[102]:3 [inlined]
 [3] #182
   @ ~/.julia/packages/Polyester/4yL9u/src/closure.jl:309 [inlined]
 [4] batch(::var"#182#185", ::Val{false}, ::Tuple{}, ::Tuple{}, ::Tuple{Static.StaticInt{100}, Int64}, ::Static.StaticInt{1}, ::Static.StaticInt{1}, ::Polyester.NoLoop, ::Polyester.CombineIndices, ::Vector{Int64}, ::Vector{Float64})
   @ Polyester ~/.julia/packages/Polyester/4yL9u/src/batch.jl:323
 [5] top-level scope
   @ ~/.julia/packages/Polyester/4yL9u/src/closure.jl:456

A related question is that if I instead define the function as the following, I get another error (that it does not recognize myfunc).

# This does not work
Polyester.@batch for i = 1:100
     myfunc(x) = temp(x, i) # here is the difference.
     outputs[i] = myfunc(1)
end

Thanks for the help.