`eltype` not inferred in broadcasting involving sparse arrays

[jishnub]

julia> using LinearAlgebra, SparseArrays, StructArrays

julia> D = sparse(Diagonal(Float64[1:4;]));

julia> S = StructArray{ComplexF64}((D, D));

julia> ComplexF64.(S)
4×4 SparseMatrixCSC{Any, Int64} with 4 stored entries:
Error showing value of type SparseMatrixCSC{Any, Int64}:
ERROR: MethodError: no method matching zero(::Type{Any})

Closest candidates are:
  zero(::Type{Union{Missing, T}}) where T
   @ Base missing.jl:105
  zero(::Union{Type{P}, P}) where P<:Dates.Period
   @ Dates ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/Dates/src/periods.jl:51
  zero(::AbstractIrrational)
   @ Base irrationals.jl:151
  ...

Stacktrace:
  [1] zero(#unused#::Type{Any})
    @ Base ./missing.jl:106
  [2] getindex
    @ ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/SparseArrays/src/sparsematrix.jl:2504 [inlined]
  [3] isassigned(::SparseMatrixCSC{Any, Int64}, ::Int64, ::Int64)
    @ Base ./abstractarray.jl:606
  [4] alignment(io::IOContext{Base.TTY}, X::AbstractVecOrMat, rows::Vector{Int64}, cols::Vector{Int64}, cols_if_complete::Int64, cols_otherwise::Int64, sep::Int64, ncols::Int64)
    @ Base ./arrayshow.jl:68
  [5] _print_matrix(io::IOContext{Base.TTY}, X::AbstractVecOrMat, pre::String, sep::String, post::String, hdots::String, vdots::String, ddots::String, hmod::Int64, vmod::Int64, rowsA::UnitRange{Int64}, colsA::UnitRange{Int64})
    @ Base ./arrayshow.jl:207
  [6] print_matrix(io::IOContext{Base.TTY}, X::SparseMatrixCSC{Any, Int64}, pre::String, sep::String, post::String, hdots::String, vdots::String, ddots::String, hmod::Int64, vmod::Int64)
    @ Base ./arrayshow.jl:171
  [7] print_matrix
    @ ./arrayshow.jl:171 [inlined]
  [8] print_array(io::IOContext{Base.TTY}, S::SparseMatrixCSC{Any, Int64})
    @ SparseArrays ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/SparseArrays/src/sparsematrix.jl:339
  [9] show(io::IOContext{Base.TTY}, #unused#::MIME{Symbol("text/plain")}, X::SparseMatrixCSC{Any, Int64})
    @ Base ./arrayshow.jl:399
 [10] (::REPL.var"#55#56"{REPL.REPLDisplay{REPL.LineEditREPL}, MIME{Symbol("text/plain")}, Base.RefValue{Any}})(io::Any)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:276
 [11] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:557
 [12] display(d::REPL.REPLDisplay, mime::MIME{Symbol("text/plain")}, x::Any)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:262
 [13] display
    @ ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:281 [inlined]
 [14] display(x::Any)
    @ Base.Multimedia ./multimedia.jl:340
 [15] #invokelatest#2
    @ ./essentials.jl:816 [inlined]
 [16] invokelatest
    @ ./essentials.jl:813 [inlined]
 [17] print_response(errio::IO, response::Any, show_value::Bool, have_color::Bool, specialdisplay::Union{Nothing, AbstractDisplay})
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:305
 [18] (::REPL.var"#57#58"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:287
 [19] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:557
 [20] print_response(repl::REPL.AbstractREPL, response::Any, show_value::Bool, have_color::Bool)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:285
 [21] (::REPL.var"#do_respond#80"{Bool, Bool, REPL.var"#93#103"{REPL.LineEditREPL, REPL.REPLHistoryProvider}, REPL.LineEditREPL, REPL.LineEdit.Prompt})(s::REPL.LineEdit.MIState, buf::Any, ok::Bool)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:899
 [22] #invokelatest#2
    @ ./essentials.jl:816 [inlined]
 [23] invokelatest
    @ ./essentials.jl:813 [inlined]
 [24] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
    @ REPL.LineEdit ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/LineEdit.jl:2647
 [25] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
    @ REPL ~/packages/julias/julia-1.9/share/julia/stdlib/v1.9/REPL/src/REPL.jl:1300
 [26] (::REPL.var"#62#68"{REPL.LineEditREPL, REPL.REPLBackendRef})()
    @ REPL ./task.jl:514

However, this works:

julia> D = Diagonal(Float64[1:4;]);

julia> S = StructArray{ComplexF64}((D, D));

julia> ComplexF64.(S)
4×4 Diagonal{ComplexF64, Vector{ComplexF64}}:
 1.0+1.0im      ⋅          ⋅          ⋅    
     ⋅      2.0+2.0im      ⋅          ⋅    
     ⋅          ⋅      3.0+3.0im      ⋅    
     ⋅          ⋅          ⋅      4.0+4.0im