Microsoft.Extensions.DependencyInjection.Abstractions.dll already loaded due to Omnisharp dependencies

I’m running 2019.11.1 (the out of band fix for the @ problem #2274 ) and cannot import Az.Resources anymore as a dll is already loaded. It still imports fine outside of the integrated terminal so I’m curious if something changed in this release that might cause this?

PSVersion

Name                           Value
----                           -----
PSVersion                      7.0.0-preview.5
PSEdition                      Core
GitCommitId                    7.0.0-preview.5
OS                             Darwin 19.0.0 Darwin Kernel Version 19.0.0: Thu Oct 17 16:17:15 PDT 2019; root:xnu-6153.41.3~29/RELEASE_X86_64
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Loaded Modules:

ModuleType Version    PreRelease Name                                ExportedCommands
---------- -------    ---------- ----                                ----------------
Manifest   7.0.0.0               Microsoft.PowerShell.Management     {Add-Content, Clear-Content, Clear-Item, Clear-ItemProperty…}
Manifest   7.0.0.0               Microsoft.PowerShell.Security       {ConvertFrom-SecureString, ConvertTo-SecureString, Get-Credential, Get-ExecutionPolicy…}
Manifest   7.0.0.0               Microsoft.PowerShell.Utility        {Add-Member, Add-Type, Clear-Variable, Compare-Object…}
Script     2.0.325               oh-my-posh                          {Get-ComputerName, Get-Drive, Get-FullPath, Get-ShortPath…}
Script     0.7.3                 posh-git                            {Add-PoshGitToProfile, Add-SshKey, Enable-GitColors, Expand-GitCommand…}
Script     0.2.0                 PowerShellEditorServices.Commands   {ConvertFrom-ScriptExtent, ConvertTo-ScriptExtent, Find-Ast, Get-Token…}
Binary     0.2.0                 PowerShellEditorServices.VSCode     {Close-VSCodeHtmlContentView, New-VSCodeHtmlContentView, Set-VSCodeHtmlContentView, Show-VSCodeHtmlContentView…}
Script     2.0.0      beta5      PSReadLine                          {Get-PSReadLineKeyHandler, Get-PSReadLineOption, Remove-PSReadLineKeyHandler, Set-PSReadLineKeyHandler…}

Trying to load Az.Resources

Exception             : 
    Message    : Assembly with same name is already loaded
    TargetSite : 
        Name          : Bind_LoadAssemblies
        DeclaringType : System.Management.Automation.Runspaces.InitialSessionState
        MemberType    : Method
        Module        : System.Management.Automation.dll
    StackTrace : 
   at System.Management.Automation.Runspaces.InitialSessionState.Bind_LoadAssemblies(ExecutionContext context)
   at System.Management.Automation.Runspaces.InitialSessionState.Bind(ExecutionContext context, Boolean updateOnly, PSModuleInfo module, Boolean noClobber, Boolean local, Boolean setLocation)
   at Microsoft.PowerShell.Commands.ModuleCmdletBase.LoadModuleManifest(String moduleManifestPath, ExternalScriptInfo manifestScriptInfo, Hashtable data, Hashtable localizedData, ManifestProcessingFlags manifestProcessingFlags, Version minimumVersion, Version maximumVersion, Version requiredVersion, Nullable`1 requiredModuleGuid, ImportModuleOptions& options, Boolean& containedErrors)
    Source     : System.Management.Automation
    HResult    : -2146232799
CategoryInfo          : InvalidOperation: (:) [Import-Module], FileLoadException
FullyQualifiedErrorId : FormatXmlUpdateException,Microsoft.PowerShell.Commands.ImportModuleCommand
InvocationInfo        : 
    MyCommand        : Import-Module
    ScriptLineNumber : 1
    OffsetInLine     : 1
    HistoryId        : 20
    Line             : ipmo az.resources
    PositionMessage  : At line:1 char:1
                       + ipmo az.resources
                       + ~~~~~~~~~~~~~~~~~
    InvocationName   : ipmo
    CommandOrigin    : Internal
ScriptStackTrace      : at <ScriptBlock>, <No file>: line 1

[rjmholt]

I’ve made some progress here:

Still work to do (1) investigating and implementing solutions in .NET Framework, and (2) migrating the rest of our startup logic to C#, since I had to rewrite it all to set the load order in stone.

[rjmholt]

Looks like it’s Primitives + DI.Abstractions – the Omnisharp LSP library depends on them.

We’ll need to investigate a workaround for the dependency hell issue. We’ve already discussed pushing the LSP work into another thread or process in a different issue, but that was also deemed to be too breaking due to argument completers and static class bits not working.