Stack trace of a Pkg.jl bug. (https://github.com/JuliaLang/Pkg.jl/issues/574)

pkg_error.jl

(Proj) pkg> rm Sp┌ Error: Error in the keymap
│   exception =
│    type Nothing has no field ver
│    Stacktrace:
│     [1] getproperty(::Any, ::Symbol) at ./sysimg.jl:18
│     [2] __installed(::Pkg.Types.PackageMode) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/API.jl:284
│     [3] complete_installed_package at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:773 [inlined]
│     [4] complete_argument(::String, ::Int64, ::Int64, ::Pkg.REPLMode.CommandKind, ::Bool) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:821
│     [5] completions(::String, ::Int64) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:853
│     [6] complete_line(::Pkg.REPLMode.PkgCompletionProvider, ::REPL.LineEdit.PromptState) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:761
│     [7] complete_line(::REPL.LineEdit.PromptState, ::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:317
│     [8] complete_line(::REPL.LineEdit.MIState) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:308
│     [9] edit_tab(::REPL.LineEdit.MIState, ::Any, ::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:1949 (repeats 2 times)
│     [10] (::getfield(REPL.LineEdit, Symbol("##108#160")))(::Any, ::Any, ::Vararg{Any,N} where N) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:1990
│     [11] #invokelatest#1 at ./essentials.jl:697 [inlined]
│     [12] invokelatest at ./essentials.jl:696 [inlined]
│     [13] (::getfield(REPL.LineEdit, Symbol("##27#28")){getfield(REPL.LineEdit, Symbol("##108#160")),String})(::Any, ::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:1319
│     [14] prompt!(::REPL.Terminals.TextTerminal, ::REPL.LineEdit.ModalInterface, ::REPL.LineEdit.MIState) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:2360
│     [15] run_interface(::REPL.Terminals.TextTerminal, ::REPL.LineEdit.ModalInterface, ::REPL.LineEdit.MIState) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:2263
│     [16] run_frontend(::REPL.LineEditREPL, ::REPL.REPLBackendRef) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/REPL.jl:1034
│     [17] run_repl(::REPL.AbstractREPL, ::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/REPL.jl:191
│     [18] (::getfield(Base, Symbol("##719#721")){Bool,Bool,Bool,Bool})(::Module) at ./logging.jl:309
│     [19] #invokelatest#1 at ./essentials.jl:697 [inlined]
│     [20] invokelatest at ./essentials.jl:696 [inlined]
│     [21] macro expansion at ./logging.jl:306 [inlined]
│     [22] run_main_repl(::Bool, ::Bool, ::Bool, ::Bool, ::Bool) at ./client.jl:334
│     [23] exec_options(::Base.JLOptions) at ./client.jl:246
│     [24] _start() at ./client.jl:425
└ @ REPL.LineEdit /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:2362