Indexing operation results in `::ANY` using `code_warntype`

General Usage
1

MWE on Julia 0.6, OSX x64 binary release; let me know if I should file a bug report. Seems as if the type of u0 should be easy to infer.

init(f, x) = f.(x)
function test(f, nx)
    x = linspace(0., 1., nx)
    u = init(f, x)
    u0 = u[1:nx-1]::Array{Float64, 1}
    return u0
end
@code_warntype test(sin, 10)

results in

Variables:
  #self#::#test
  f::Base.#sin
  nx::Int64
  x::StepRangeLen{Float64,Base.TwicePrecision{Float64},Base.TwicePrecision{Float64}}
  u::Array{Float64,1}
  u0::ANY
etc.

(full @code_warntype output here)

2

Harmless unused variable. Ignore it if you didn’t see it in the code.