PowerShell: Expand Alias command doesn't work on macOS

[TylerLeonhardt]

Issue Description

PowerShell: Expand Alias command doesn't work on macOS. The Integrated Console reacts to the command by showing a new prompt.

Attached are the logs.

This looks to be the important bit:

2/2/18 9:15:57 AM [VERBOSE] - Method "ExecuteCommand" at line 491 of C:\projects\powershelleditorservices\src\PowerShellEditorServices\Session\PowerShellContext.cs

    Attempting to execute command(s):
    
    
    function __Expand-Alias {
    
        param($targetScript)
    
        [ref]$errors=$null
    
        $tokens = [System.Management.Automation.PsParser]::Tokenize($targetScript, $errors).Where({$_.type -eq 'command'}) |
                        Sort Start -Descending
    
        foreach ($token in  $tokens) {
            $definition=(Get-Command ('`'+$token.Content) -CommandType Alias -ErrorAction SilentlyContinue).Definition
    
            if($definition) {
                $lhs=$targetScript.Substring(0, $token.Start)
                $rhs=$targetScript.Substring($token.Start + $token.Length)
    
                $targetScript=$lhs + $definition + $rhs
           }
        }
    
        $targetScript
    }
    

2/2/18 9:15:57 AM [VERBOSE] - Method "OnSessionStateChanged" at line 1138 of C:\projects\powershelleditorservices\src\PowerShellEditorServices\Session\PowerShellContext.cs

    Session state changed --
    
        Old state: Ready
        New state: Running
        Result: NotFinished

2/2/18 9:15:57 AM [VERBOSE] - Method "OnSessionStateChanged" at line 1138 of C:\projects\powershelleditorservices\src\PowerShellEditorServices\Session\PowerShellContext.cs

    Session state changed --
    
        Old state: Running
        New state: Ready
        Result: Completed

2/2/18 9:15:57 AM [ERROR] - Method "ExecuteCommand" at line 545 of C:\projects\powershelleditorservices\src\PowerShellEditorServices\Session\PowerShellContext.cs

    Execution completed with errors:
    
    The term 'Sort' is not recognized as the name of a cmdlet, function, script file, or operable program.
    Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
    The term 'Sort' is not recognized as the name of a cmdlet, function, script file, or operable program.
    Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
    The term 'Sort' is not recognized as the name of a cmdlet, function, script file, or operable program.
    Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
    The term 'Sort' is not recognized as the name of a cmdlet, function, script file, or operable program.
    Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
    The term 'Sort' is not recognized as the name of a cmdlet, function, script file, or operable program.
    Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

Just not sure why that error would get thrown.

Attached Logs

logs.zip

Environment Information

Visual Studio Code

Name	Version
Operating System	Darwin x64 16.7.0
VSCode	1.20.0-insider
PowerShell Extension Version	1.5.1

PowerShell Information

Name	Value
PSVersion	6.0.0-rc.2
PSEdition	Core
GitCommitId	v6.0.0-rc.2
OS	Darwin 16.7.0 Darwin Kernel Version 16.7.0: Thu Jan 11 22:59:40 PST 2018, root:xnu-3789.73.8~1/RELEASE_X86_64
Platform	Unix
PSCompatibleVersions	1.0 2.0 3.0 4.0 5.0 5.1.10032.0 6.0.0-rc.2
PSRemotingProtocolVersion	2.3
SerializationVersion	1.1.0.1
WSManStackVersion	3.0

Visual Studio Code Extensions

Visual Studio Code Extensions(Click to Expand)

Extension	Author	Version
beautify	HookyQR	1.3.0
code-settings-sync	Shan	2.8.7
color-highlight	naumovs	2.3.0
csharp	ms-vscode	1.13.1
docthis	joelday	0.6.0
ExtensionUpdateCheck	HookyQR	0.0.2
ftp-simple	humy2833	0.5.8
hipsum	third774	1.0.7
indent-rainbow	oderwat	0.7.2
indent4to2	Compulim	0.1.2
path-intellisense	christian-kohler	1.4.2
PowerShell	ms-vscode	1.5.1
puppypopup	StineTheBean	0.0.2
slack	sozercan	0.0.14
Theme-azure	gerane	0.0.2
Theme-BetterJS	gerane	0.0.3
theme-monokai-dark-soda	AdamCaviness	0.0.5
theme-monoko	smdl	0.0.1
theme-railgun	be5invis	2.3.0
theme-toothpaste	aalaap	0.0.1
Theme-Zenburn	gerane	0.0.3
trailing-spaces	shardulm94	0.2.11
tslint	eg2	1.0.24
vscode-dash	deerawan	1.8.0
vscode-docker	PeterJausovec	0.0.23
vscode-file-peek	abierbaum	1.0.1
vscode-icons	robertohuertasm	7.19.0
vscode-markdownlint	DavidAnson	0.13.0
vscode-npm-script	eg2	0.3.3
vscode-svgviewer	cssho	1.4.3
word-count	hypnoes	0.1.1