display() error

[tomyun]

before:

julia> collect(())
0-element Array{Union{},1}

after using Contour:

julia> using Contour

julia> collect(())
Error showing value of type Array{Union{},1}:
ERROR: MethodError: no method matching display(::Array{Union{},1})
Closest candidates are:
  display(::Any) at multimedia.jl:320
  display(::AbstractDisplay, ::AbstractString, ::Any) at multimedia.jl:214
  display(::AbstractString, ::Any) at multimedia.jl:215
  ...
Stacktrace:
 [1] display(::Any) at ./multimedia.jl:330
 [2] #invokelatest#1 at ./essentials.jl:712 [inlined]
 [3] invokelatest at ./essentials.jl:711 [inlined]
 [4] print_response(::IO, ::Any, ::Bool, ::Bool, ::Any) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.4/REPL/src/REPL.jl:161
 [5] print_response(::REPL.AbstractREPL, ::Any, ::Bool, ::Bool) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.4/REPL/src/REPL.jl:146
 [6] (::REPL.var"#do_respond#38"{Bool,REPL.var"#48#57"{REPL.LineEditREPL,REPL.REPLHistoryProvider},REPL.LineEditREPL,REPL.LineEdit.Prompt})(::Any, ::Any, ::Any) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.4/REPL/src/REPL.jl:729
 [7] #invokelatest#1 at ./essentials.jl:712 [inlined]
 [8] invokelatest at ./essentials.jl:711 [inlined]
 [9] run_interface(::REPL.Terminals.TextTerminal, ::REPL.LineEdit.ModalInterface, ::REPL.LineEdit.MIState) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.4/REPL/src/LineEdit.jl:2354
 [10] run_frontend(::REPL.LineEditREPL, ::REPL.REPLBackendRef) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.4/REPL/src/REPL.jl:1055
 [11] run_repl(::REPL.AbstractREPL, ::Any) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.4/REPL/src/REPL.jl:206
 [12] (::Base.var"#764#766"{Bool,Bool,Bool,Bool})(::Module) at ./client.jl:383
 [13] #invokelatest#1 at ./essentials.jl:712 [inlined]
 [14] invokelatest at ./essentials.jl:711 [inlined]
 [15] run_main_repl(::Bool, ::Bool, ::Bool, ::Bool, ::Bool) at ./client.jl:367
 [16] exec_options(::Base.JLOptions) at ./client.jl:305
 [17] _start() at ./client.jl:484

from GiovineItalia/Gadfly.jl#1460

[sjkelly]

Thanks for the bug report and apologies for the delay. This should be fixed in the 0.5.4 release which has just been tagged.