Can't print transposed GBVector if there are missing values

[andreyz4k]

julia> B = GBVector([3, 4, 5, 6, 7], [3, 4, 5, 6, 7])
7x1 GraphBLAS int64_t matrix, bitmap by col
  5 entries, memory: 272 bytes

    (3,1)   3
    (4,1)   4
    (5,1)   5
    (6,1)   6
    (7,1)   7

julia> B'
1×7 transpose(::GBVector{Int64, Nothing}) with eltype Int64:
Error showing value of type LinearAlgebra.Transpose{Int64, GBVector{Int64, Nothing}}:
ERROR: TypeError: in typeassert, expected Int64, got a value of type Nothing
Stacktrace:
  [1] getindex
    @ /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/LinearAlgebra/src/adjtrans.jl:178 [inlined]
  [2] _getindex
    @ ./abstractarray.jl:1245 [inlined]
  [3] getindex
    @ ./abstractarray.jl:1218 [inlined]
  [4] isassigned(::LinearAlgebra.Transpose{Int64, GBVector{Int64, Nothing}}, ::Int64, ::Int64)
    @ Base ./abstractarray.jl:553
  [5] alignment(io::IOContext{Base.TTY}, X::AbstractVecOrMat, rows::Vector{Int64}, cols::Vector{Int64}, cols_if_complete::Int64, cols_otherwise::Int64, sep::Int64)
    @ Base ./arrayshow.jl:67
  [6] _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:204
  [7] print_matrix(io::IOContext{Base.TTY}, X::LinearAlgebra.Transpose{Int64, GBVector{Int64, Nothing}}, pre::String, sep::String, post::String, hdots::String, vdots::String, ddots::String, hmod::Int64, vmod::Int64) (repeats 2 times)
    @ Base ./arrayshow.jl:169
  [8] print_array
    @ ./arrayshow.jl:355 [inlined]
  [9] show(io::IOContext{Base.TTY}, #unused#::MIME{Symbol("text/plain")}, X::LinearAlgebra.Transpose{Int64, GBVector{Int64, Nothing}})
    @ Base ./arrayshow.jl:396
 [10] (::REPL.var"#43#44"{REPL.REPLDisplay{REPL.LineEditREPL}, MIME{Symbol("text/plain")}, Base.RefValue{Any}})(io::Any)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:266
 [11] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:510
 [12] display(d::REPL.REPLDisplay, mime::MIME{Symbol("text/plain")}, x::Any)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:259
 [13] display(d::REPL.REPLDisplay, x::Any)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:271
 [14] display(x::Any)
    @ Base.Multimedia ./multimedia.jl:328
 [15] #invokelatest#2
    @ ./essentials.jl:716 [inlined]
 [16] invokelatest
    @ ./essentials.jl:714 [inlined]
 [17] print_response(errio::IO, response::Any, show_value::Bool, have_color::Bool, specialdisplay::Union{Nothing, AbstractDisplay})
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:293
 [18] (::REPL.var"#45#46"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:277
 [19] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:510
 [20] print_response(repl::REPL.AbstractREPL, response::Any, show_value::Bool, have_color::Bool)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:275
 [21] (::REPL.var"#do_respond#66"{Bool, Bool, REPL.var"#77#87"{REPL.LineEditREPL, REPL.REPLHistoryProvider}, REPL.LineEditREPL, REPL.LineEdit.Prompt})(s::REPL.LineEdit.MIState, buf::Any, ok::Bool)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:846
 [22] #invokelatest#2
    @ ./essentials.jl:716 [inlined]
 [23] invokelatest
    @ ./essentials.jl:714 [inlined]
 [24] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
    @ REPL.LineEdit /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2493
 [25] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:1232
 [26] (::REPL.var"#49#54"{REPL.LineEditREPL, REPL.REPLBackendRef})()
    @ REPL ./task.jl:423