Environment data

PS version: 5.1.17763.316
PSReadline version: 2.0.0-beta2
os: 10.0.17763.1 (WinBuild.160101.0800)
PS file version: 10.0.17763.1 (WinBuild.160101.0800)

Steps to reproduce or exception report

Oops, something went wrong. Please report this bug with the details below.
Report on GitHub: https://github.com/lzybkr/PSReadLine/issues/new

Last 55 Keys:
s t a r t - p r o c e s s Space $ e n v : w i n d i r \ n o t e p a d . e x e Space | Space o u t - n u l l Home Delete Delete Delete Delete Delete Delete

Exception:
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Microsoft.PowerShell.PSConsoleReadLine.GenerateRender(String defaultColor)
at Microsoft.PowerShell.PSConsoleReadLine.ForceRender()
at Microsoft.PowerShell.PSConsoleReadLine.DeleteCharImpl(Int32 qty, Boolean orExit)
at Microsoft.PowerShell.PSConsoleReadLine.DeleteChar(Nullable1 key, Object arg) at Microsoft.PowerShell.PSConsoleReadLine.ProcessOneKey(ConsoleKeyInfo key, Dictionary2 dispatchTable, Boolean ignoreIfNoAction, Object arg)
at Microsoft.PowerShell.PSConsoleReadLine.InputLoop()
at Microsoft.PowerShell.PSConsoleReadLine.ReadLine(Runspace runspace, EngineIntrinsics engineIntrinsics)