get-help get-process throws System.NullReferenceException #1611

Steps to reproduce

1. Get a Ubuntun 14.04 machine
2. Install PowerShell
3. Launch PowerShell
4. Run " get-help get-process"

Expected behavior

Help content for get-process cmdlet

Actual behavior

PS /home/chythu> get-help get-process
get-help : Object reference not set to an instance of an object.
At line:1 char:1

• get-help get-process

• - CategoryInfo          : NotSpecified: (:) [Get-Help], NullReferenceException
  - FullyQualifiedErrorId : System.NullReferenceException,Microsoft.PowerShell.Commands.G
    etHelpCommand
  
  

PS /home/chythu> $error[0].exception.stacktrace
at System.Management.Automation.Help.UpdatableHelpSystem.ShouldPromptToUpdateHelp() in /home/andrew/src/PowerShell/src/System.Management.Automation/help/UpdatableHelpSystem.cs:line 1757
at Microsoft.PowerShell.Commands.GetHelpCommand.BeginProcessing() in /home/andrew/src/PowerShell/src/System.Management.Automation/help/HelpCommands.cs:line 324
at System.Management.Automation.Cmdlet.DoBeginProcessing() in /home/andrew/src/PowerShell/src/System.Management.Automation/engine/cmdlet.cs:line 172
at System.Management.Automation.CommandProcessorBase.DoBegin() in /home/andrew/src/PowerShell/src/System.Management.Automation/engine/CommandProcessorBase.cs:line 514

Environment data

PS /home/chythu> $psversiontable

Name Value

PSVersion 5.1.10032.0
PSEdition PowerShellCore
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 3.0.0.0
GitCommitId v6.0.0-alpha.7
CLRVersion
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1