Update to 5.1 breaks Get-WindowsFeature when Carbon module is installed
I've been testing WMF 5.1 recently and noticed a random issue. After installing WMF 5.1 I could no longer run Get-WindowsFeature. I get the following error:
PS C:\> Get-WindowsFeature
Get-WindowsFeature : The term 'Get-WindowsFeature' 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
At line:1 char:1
+ CategoryInfo : ObjectNotFound: (Get-WindowsFeature:String) , CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
Tab complete still works for the cmdlet however. After some digging, I figured out that the issue happens because we have the Carbon module installed (https://www.powershellgallery.com/packages/Carbon/2.4.1) which is utilized by our DSC configuration. If I explicitly run Import-Module Servermanager, Get-WindowsFeature works fine. When I delete Carbon from the server, the Get-WindowsFeature cmdlet works without any issues.
It worked fine with WMF 5.0. It only breaks when 5.1 is installed. I did notice that Carbon has a function in its Functions folder called Get-WindowsFeature.ps1. That function is also listed in the module manifest under "FunctionsToExport". If I remove Get-WindowsFeature from FunctionsToExport, the Get-WindowsFeature cmdlet works again.
I'm wondering why this module would work fine under WMF 5.0 but breaks now under 5.1