Companion issue

[kersulis]

In the REPL, the line

Companion([1;2;3])

throws this error:

Error showing value of type SpecialMatrices.Companion{Int64}:
ERROR: MethodError: isassigned(::SpecialMatrices.Companion{Int64}, ::Int64, ::Int64) is ambiguous. Candidates:
  isassigned(C::SpecialMatrices.Companion, i, j) at /home/jkersulis/.julia/v0.5/SpecialMatrices/src/companion.jl:18
  isassigned(a::AbstractArray, i::Int64...) at abstractarray.jl:185
 in alignment(::IOContext{Base.Terminals.TTYTerminal}, ::SpecialMatrices.Companion{Int64}, ::Array{Int64,1}, ::Array{Int64,1}, ::Int64, ::Int64, ::Int64) at ./show.jl:1277
 in print_matrix(::IOContext{Base.Terminals.TTYTerminal}, ::SpecialMatrices.Companion{Int64}, ::String, ::String, ::String, ::String, ::String, ::String, ::Int64, ::Int64) at ./show.jl:1407
 in print_matrix(::IOContext{Base.Terminals.TTYTerminal}, ::SpecialMatrices.Companion{Int64}, ::String, ::String, ::String) at ./show.jl:1379
 in #showarray#330(::Bool, ::Function, ::IOContext{Base.Terminals.TTYTerminal}, ::SpecialMatrices.Companion{Int64}, ::Bool) at ./show.jl:1618
 in display(::Base.REPL.REPLDisplay{Base.REPL.LineEditREPL}, ::MIME{Symbol("text/plain")}, ::SpecialMatrices.Companion{Int64}) at ./REPL.jl:132
 in display(::Base.REPL.REPLDisplay{Base.REPL.LineEditREPL}, ::SpecialMatrices.Companion{Int64}) at ./REPL.jl:135
 in display(::SpecialMatrices.Companion{Int64}) at ./multimedia.jl:143
 in print_response(::Base.Terminals.TTYTerminal, ::Any, ::Void, ::Bool, ::Bool, ::Void) at ./REPL.jl:154
 in print_response(::Base.REPL.LineEditREPL, ::Any, ::Void, ::Bool, ::Bool) at ./REPL.jl:139
 in (::Base.REPL.##22#23{Bool,Base.REPL.##33#42{Base.REPL.LineEditREPL,Base.REPL.REPLHistoryProvider},Base.REPL.LineEditREPL,Base.LineEdit.Prompt})(::Base.LineEdit.MIState, ::Base.AbstractIOBuffer{Array{UInt8,1}}, ::Bool) at ./REPL.jl:652
 in run_interface(::Base.Terminals.TTYTerminal, ::Base.LineEdit.ModalInterface) at ./LineEdit.jl:1579
 in run_frontend(::Base.REPL.LineEditREPL, ::Base.REPL.REPLBackendRef) at ./REPL.jl:903
 in run_repl(::Base.REPL.LineEditREPL, ::Base.##930#931) at ./REPL.jl:188
 in _start() at ./client.jl:360

Can anyone else reproduce this?

[ivanslapnicar]

Did you try Pkg.checkout("SpecialMatrices")?
If you are running Julia 5.0 this is necessary.

[kersulis]

That did it, thanks! There should probably be a note about this in the README, since that error message didn't suggest it was a version incompatibility issue.