sprand is type unstable

[KristofferC]

julia> @code_warntype sprand(5,5,0.1)
Variables:
  #self#::Base.SparseArrays.#sprand
  m::Int64
  n::Int64
  density::Float64

Body:
  begin  # sparse/sparsematrix.jl, line 927:
      return (Base.SparseArrays.sprand)(Base.SparseArrays.GLOBAL_RNG,m::Int64,n::Int64,density::Float64)::Union{SparseMatrixCSC{Float64,Int64},SparseVector{Float64,Int64}}
  end::Union{SparseMatrixCSC{Float64,Int64},SparseVector{Float64,Int64}}

[KristofferC]

Problematic line:

julia/base/sparse/sparsematrix.jl

Line 910 in c8b9fe9

N == 1 && return rand(r) <= density ? sparse(rfn(r,1)) : spzeros(T,1,1)

:

julia> sprand(Base.Random.GLOBAL_RNG,1,1,0.99,rand,Float64)
Sparse vector of length 1, with 1 Float64 nonzero entries:
  [1]  =  0.125714