REPL: BoundsError in history search

[KristofferC]

To reproduce:

• Ctrl-R to enter reverse mode
• Paste som gibberish
• Press Ctrl-R again

': verse-i-search)` sdgfdfgdfgfdgfdgfd        ┌ Error: Error in the keymap
│   exception =
│    BoundsError: attempt to access ""
│      at index [0]
│    Stacktrace:
│     [1] prevind(::String, ::Int64, ::Int64) at ./strings/basic.jl:460
│     [2] prevind(::String, ::Int64) at ./strings/basic.jl:455
│     [3] history_search(::REPL.REPLHistoryProvider, ::Base.GenericIOBuffer{Array{UInt8,1}}, ::Base.GenericIOBuffer{Array{UInt8,1}}, ::Bool, ::Bool) at /Users/kristoffer/julia/usr/share/julia/stdlib/v1.1/REPL/src/REPL.jl:631
│     [4] history_next_result(::REPL.LineEdit.MIState, ::REPL.LineEdit.SearchState) at /Users/kristoffer/julia/usr/share/julia/stdlib/v1.1/REPL/src/LineEdit.jl:1565
│     [5] (::getfield(REPL.LineEdit, Symbol("##44#75")))(::Any, ::Any, ::Any) at /Users/kristoffer/julia/usr/share/julia/stdlib/v1.1/REPL/src/LineEdit.jl:1777
...

The paste is not necessary, you can also type something that doesn't make any result in the reverse search come up and trigger the same behavior. Pasting is easier though.