BoundsError when NullableArray a field

[merl-dev]

Not sure if I missed something about iteration interfaces or NullableArrays, but consider the following (valid for NullableArrays 0.1.0 and master, julia v0.5.1 and 0.6.0-pre.beta.14, on ubuntu 14):

julia> type A
           arr::Array{String}
       end

julia> a = A(String[])
A(String[])

julia> start(a.arr)
1

julia> done(a.arr, 1)
true

julia> using NullableArrays
WARNING: Method definition ==(Base.Nullable{S}, Base.Nullable{T}) in module Base at nullable.jl:244 overwritten in module NullableArrays at /home/yjb/.julia/v0.6/NullableArrays/src/operators.jl:128.

julia> type B
           arr::NullableArray{String}
       end

julia> b = B(NullableArray{String}[])
B(Nullable{String}[])

julia> start(b.arr)
(Base.OneTo(0), 1)

julia> done(b.arr, 1)
ERROR: BoundsError
Stacktrace:
 [1] getindex at ./number.jl:38 [inlined]
 [2] done(::NullableArrays.NullableArray{String,1}, ::Int64) at ./abstractarray.jl:753

To be sure:

julia> c = NullableArray{String}[]
0-element Array{NullableArrays.NullableArray{String,N} where N,1}

julia> start(c)
1

julia> done(c, 1)
true

[merl-dev]

reposting on discourse...

[nalimilan]

Reference: https://discourse.julialang.org/t/boundserror-when-nullablearray-a-field/3084