Some display methods require the IOStream to be still open

[giordano]

From https://github.com/JuliaBinaryWrappers/RDKit_jll.jl/releases/download/RDKit-v2022.9.1%2B0/RDKit.v2022.9.1.x86_64-w64-mingw32-cxx11.tar.gz

julia> using ObjectFile

julia> readmeta("./librdkitcffi.dll") do oh
           [s for s in Symbols(oh) if contains(symbol_name(s), r"get_(|q)mol")]
       end
3-element Vector{COFFSymbolRef{COFFHandle{IOStream}}}:
Error showing value of type Vector{COFFSymbolRef{COFFHandle{IOStream}}}:
ERROR: SystemError: seek: Bad file descriptor
Stacktrace:
  [1] systemerror(p::String, errno::Int32; extrainfo::Nothing)
    @ Base ./error.jl:176
  [2] #systemerror#80
    @ ./error.jl:175 [inlined]
  [3] systemerror
    @ ./error.jl:175 [inlined]
  [4] seek(s::IOStream, n::UInt64)
    @ Base ./iostream.jl:129
  [5] seek(oh::COFFHandle{IOStream}, pos::UInt64)
    @ ObjectFile ~/.julia/packages/ObjectFile/lbue6/src/Abstract/ObjectHandle.jl:183
  [6] strtab_lookup(strtab::COFFStrTab{COFFHandle{IOStream}}, index::UInt64)
    @ ObjectFile.COFF ~/.julia/packages/ObjectFile/lbue6/src/COFF/COFFStrTab.jl:18
  [7] symbol_name
    @ ~/.julia/packages/ObjectFile/lbue6/src/COFF/COFFSymbol.jl:125 [inlined]
  [8] show(io::IOContext{IOBuffer}, sym::COFFSymbolRef{COFFHandle{IOStream}})
    @ ObjectFile ~/.julia/packages/ObjectFile/lbue6/src/Abstract/Symbol.jl:233
  [9] sprint(f::Function, args::COFFSymbolRef{COFFHandle{IOStream}}; context::IOContext{Base.TTY}, sizehint::Int64)
    @ Base ./strings/io.jl:112
 [10] alignment(io::IOContext{Base.TTY}, x::COFFSymbolRef{COFFHandle{IOStream}})
    @ Base ./show.jl:2735
 [11] 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:69
 [12] _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
 [13] print_matrix(io::IOContext{Base.TTY}, X::Vector{COFFSymbolRef{COFFHandle{IOStream}}}, pre::String, sep::String, post::String, hdots::String, vdots::String, ddots::String, hmod::Int64, vmod::Int64) (repeats 2 times)
    @ Base ./arrayshow.jl:171
 [14] print_array
    @ ./arrayshow.jl:358 [inlined]
 [15] show(io::IOContext{Base.TTY}, #unused#::MIME{Symbol("text/plain")}, X::Vector{COFFSymbolRef{COFFHandle{IOStream}}})
    @ Base ./arrayshow.jl:399
 [16] (::REPL.var"#43#44"{REPL.REPLDisplay{REPL.LineEditREPL}, MIME{Symbol("text/plain")}, Base.RefValue{Any}})(io::Any)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:267
 [17] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:521
 [18] display(d::REPL.REPLDisplay, mime::MIME{Symbol("text/plain")}, x::Any)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:260
 [19] display(d::REPL.REPLDisplay, x::Any)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:272
 [20] display(x::Any)
    @ Base.Multimedia ./multimedia.jl:328
 [21] #invokelatest#2
    @ ./essentials.jl:729 [inlined]
 [22] invokelatest
    @ ./essentials.jl:726 [inlined]
 [23] print_response(errio::IO, response::Any, show_value::Bool, have_color::Bool, specialdisplay::Union{Nothing, AbstractDisplay})
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:296
 [24] (::REPL.var"#45#46"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:278
 [25] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:521
 [26] print_response(repl::REPL.AbstractREPL, response::Any, show_value::Bool, have_color::Bool)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:276
 [27] (::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 ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:857
 [28] #invokelatest#2
    @ ./essentials.jl:729 [inlined]
 [29] invokelatest
    @ ./essentials.jl:726 [inlined]
 [30] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
    @ REPL.LineEdit ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/LineEdit.jl:2510
 [31] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
    @ REPL ~/.julia/juliaup/julia-1.8.2+0.x64/share/julia/stdlib/v1.8/REPL/src/REPL.jl:1248
 [32] (::REPL.var"#49#54"{REPL.LineEditREPL, REPL.REPLBackendRef})()
    @ REPL ./task.jl:484

This makes it hard to use the readmeta method with the function as first argument (which can be used with the do-block syntax), instead

julia> using ObjectFile

julia> io = open("./librdkitcffi.dll", "r")
IOStream(<file ./librdkitcffi.dll>)

julia> oh = readmeta(io)
COFF Handle (64-bit)

julia> [s for s in Symbols(oh) if contains(symbol_name(s), r"get_(|q)mol")]
3-element Vector{COFFSymbolRef{COFFHandle{IOStream}}}:
 COFF Symbol
       Name: get_mol
      Value: 33824
    Defined: Yes
     Strong: Yes
   Locality: Global
 COFF Symbol
       Name: get_qmol
      Value: 35600
    Defined: Yes
     Strong: Yes
   Locality: Global
 COFF Symbol
       Name: get_molblock
      Value: 52240
    Defined: Yes
     Strong: Yes
   Locality: Global

julia> close(io)

works, but it requires more manual steps.