adjoint print returns error

[JakobAsslaender]

Hi! I noticed that calling 'adjoint(p::NFFTPlan)` throws an error message. It seems that the adjoint is still defined and can be used, but the printing of the returned object throws an error:

julia> using NFFT

julia> p = NFFT.NFFTPlan(rand(3,100) .- 1/2, (128,128,128); fftflags = FFTW.MEASURE)
NFFTPlan with 100 sampling points for an input array of size(128, 128, 128) and an output array of size(100,) with dims 1:3

julia> pa = adjoint(p)
Error showing value of type LinearAlgebra.Adjoint{ComplexF64, NFFTPlan{Float64, 3, 1}}:
ERROR: MethodError: no method matching length(::NFFTPlan{Float64, 3, 1})
Closest candidates are:
  length(::Union{Base.KeySet, Base.ValueIterator}) at /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/base/abstractdict.jl:58
  length(::Union{LinearAlgebra.Adjoint{T, S}, LinearAlgebra.Transpose{T, S}} where {T, S}) at /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/LinearAlgebra/src/adjtrans.jl:171
  length(::Union{Tables.AbstractColumns, Tables.AbstractRow}) at ~/.julia/packages/Tables/PxO1m/src/Tables.jl:175
  ...
Stacktrace:
  [1] length(A::LinearAlgebra.Adjoint{ComplexF64, NFFTPlan{Float64, 3, 1}})
    @ LinearAlgebra /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/LinearAlgebra/src/adjtrans.jl:171
  [2] isempty(a::LinearAlgebra.Adjoint{ComplexF64, NFFTPlan{Float64, 3, 1}})
    @ Base ./abstractarray.jl:1147
  [3] show(io::IOContext{Base.TTY}, #unused#::MIME{Symbol("text/plain")}, X::LinearAlgebra.Adjoint{ComplexF64, NFFTPlan{Float64, 3, 1}})
    @ Base ./arrayshow.jl:361
  [4] (::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:264
  [5] 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:508
  [6] 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:257
  [7] display(d::REPL.REPLDisplay, x::Any)
    @ REPL /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/stdlib/v1.7/REPL/src/REPL.jl:269
  [8] display(x::Any)
    @ Base.Multimedia ./multimedia.jl:328
  [9] #invokelatest#2
    @ ./essentials.jl:716 [inlined]
 [10] invokelatest
    @ ./essentials.jl:714 [inlined]
 [11] 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:291
 [12] (::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:275
 [13] 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:508
 [14] 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:273
 [15] (::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:844
 [16] #invokelatest#2
    @ ./essentials.jl:716 [inlined]
 [17] invokelatest
    @ ./essentials.jl:714 [inlined]
 [18] 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
 [19] 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:1230
 [20] (::REPL.var"#49#54"{REPL.LineEditREPL, REPL.REPLBackendRef})()
    @ REPL ./task.jl:423

[tknopp]

Thanks, was a bit tricky since Julia wants to treat the adjoint as an array. But overloading another version of show that included MIME worked out.