Main Build Failing Suddenly

[michael-hawker]

Describe the bug

Our main build started failing near the end of last week with this error message (see run here):

"D:\a\Labs-Windows\Labs-Windows\Toolkit.Labs.All.sln" (Restore target) (1) ->
"D:\a\Labs-Windows\Labs-Windows\platforms\CommunityToolkit.Labs.Skia.Gtk\CommunityToolkit.Labs.Skia.Gtk.csproj" (_GenerateProjectRestoreGraph target) (9:5) ->
(CollectPackageDownloads target) -> 
  D:\a\Labs-Windows\Labs-Windows\platforms\CommunityToolkit.Labs.Skia.Gtk\CommunityToolkit.Labs.Skia.Gtk.csproj : error NU1505: Duplicate 'PackageDownload' items found. Remove the duplicate items or use the Update functionality to ensure a consistent restore behavior. The duplicate 'PackageDownload' items are: Microsoft.NETCore.App.Host.win-x64 [5.0.16], Microsoft.NETCore.App.Host.win-x64 [5.0.16], Microsoft.NETCore.App.Host.win-x64 [5.0.16], Microsoft.NETCore.App.Host.win-x64 [5.0.16].


"D:\a\Labs-Windows\Labs-Windows\Toolkit.Labs.All.sln" (Restore target) (1) ->
"D:\a\Labs-Windows\Labs-Windows\platforms\CommunityToolkit.Labs.Wasm\CommunityToolkit.Labs.Wasm.csproj" (_GenerateProjectRestoreGraph target) (11:5) ->
  D:\a\Labs-Windows\Labs-Windows\platforms\CommunityToolkit.Labs.Wasm\CommunityToolkit.Labs.Wasm.csproj : error NU1505: Duplicate 'PackageDownload' items found. Remove the duplicate items or use the Update functionality to ensure a consistent restore behavior. The duplicate 'PackageDownload' items are: Microsoft.NETCore.App.Host.win-x64 [5.0.16], Microsoft.NETCore.App.Host.win-x64 [5.0.16], Microsoft.NETCore.App.Host.win-x64 [5.0.16], Microsoft.NETCore.App.Host.win-x64 [5.0.16].

Not sure what may have suddenly caused this and if it's related to this Twitter thread.

Steps to reproduce

Run CI on main

Expected behavior

Passes

Screenshots

No response

Code Platform

• UWP
• WinAppSDK / WinUI 3
• Web Assembly (WASM)
• Android
• iOS
• MacOS
• Linux / GTK

Windows Build Number

• Windows 10 1809 (Build 17763)
• Windows 10 1903 (Build 18362)
• Windows 10 1909 (Build 18363)
• Windows 10 2004 (Build 19041)
• Windows 10 20H2 (Build 19042)
• Windows 10 21H1 (Build 19043)
• Windows 11 21H2 (Build 22000)
• Other (specify)

Other Windows Build number

No response

App minimum and target SDK version

• Windows 10, version 1809 (Build 17763)
• Windows 10, version 1903 (Build 18362)
• Windows 10, version 1909 (Build 18363)
• Windows 10, version 2004 (Build 19041)
• Other (specify)

Other SDK version

No response

Visual Studio Version

No response

Visual Studio Build Number

No response

Device form factor

No response

Additional context

No response

Help us help you

Yes, but only if others can assist.

[Arlodotexe]

Useful information: dotnet/sdk#24747

[michael-hawker]

Related to CommunityToolkit/Tooling-Windows-Submodule#12 as well.