Import module fails in PS7 rc2 when Az module is imported first

Steps to reproduce

What steps can reproduce the defect? Please share the setup, commandline for vstest.console, sample project, target framework etc.

PS C:\Users\<user>> Import-module Az
PS C:\Users\<user>> Import-Module PartnerCenter -Debug
VERBOSE: Loading module from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\PartnerCenter.psd1'.

Confirm
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VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Store.PartnerCenter.PowerShell.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Store.PartnerCenter.PowerShell.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.ApplicationInsights.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.ApplicationInsights.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Azure.Management.Billing.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Azure.Management.Billing.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Azure.Management.Subscription.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Azure.Management.Subscription.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Graph.Beta.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Graph.Beta.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Graph.Core.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Graph.Core.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Caching.Abstractions.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Caching.Abstractions.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Caching.Memory.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Caching.Memory.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.Abstractions.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.Abstractions.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.Binder.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.Binder.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.EnvironmentVariables.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Configuration.EnvironmentVariables.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.DependencyInjection.Abstractions.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.DependencyInjection.Abstractions.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Logging.Abstractions.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Logging.Abstractions.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Logging.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Logging.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Options.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Options.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Primitives.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Extensions.Primitives.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Identity.Client.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Identity.Client.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Identity.Client.Extensions.Msal.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Identity.Client.Extensions.Msal.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.IdentityModel.JsonWebTokens.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.IdentityModel.JsonWebTokens.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.IdentityModel.Logging.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.IdentityModel.Logging.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.IdentityModel.Tokens.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.IdentityModel.Tokens.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Rest.ClientRuntime.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Rest.ClientRuntime.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Store.PartnerCenter.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Store.PartnerCenter.dll'.
VERBOSE: Loading 'Assembly' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\System.Runtime.CompilerServices.Unsafe.dll'.
VERBOSE: Loading 'Executable' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\System.Runtime.CompilerServices.Unsafe.dll'.
VERBOSE: Loading 'FormatsToProcess' from path 'C:\Users\<user>\Documents\PowerShell\Modules\PartnerCenter\3.0.5\Microsoft.Store.PartnerCenter.PowerShell.format.ps1xml'.
Import-Module: Assembly with same name is already loaded


PS C:\Users\<user>> Get-Module -ListAvailable -Name Az


    Directory: C:\Program Files\PowerShell\Modules

ModuleType Version    PreRelease Name                                PSEdition ExportedCommands
---------- -------    ---------- ----                                --------- ----------------
Script     3.1.0                 Az                                  Core,Desk

    Directory: C:\Program Files\WindowsPowerShell\Modules

Expected behavior

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Actual behavior

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Diagnostic logs

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Environment

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[ghost]

The required code changes have been made. Right now we are targeting this coming Friday for the next official release that will include a resolution for this issue.

[cblackuk]

Also tried PS7 preview - no change there…