[main] Source code updates from dotnet/dotnet by dotnet-maestro[bot] · Pull Request #15025 · dotnet/winforms

dotnet-maestro · 2026-09-02T02:12:33Z

Note

This is a codeflow update. It may contain both source code changes from
the VMR
as well as dependency updates. Learn more here.

This pull request brings the following source code changes

From https://github.com/dotnet/dotnet

Subscription: 81d064a4-929c-4152-b746-ee3acc24b4ed
Build: 20260901.9 (329840)
Date Produced: September 1, 2026 8:00:19 PM UTC
Commit: f2b969981e123579eb8a779dc05aa8138569dff9
Commit Diff: 18aca85...f2b9699
Branch: main

Updated Dependencies

From 11.0.0-beta.26424.125 to 11.0.0-beta.26451.109
- Microsoft.DotNet.Arcade.Sdk
- Microsoft.DotNet.Build.Tasks.Templating
- Microsoft.DotNet.CMake.Sdk
- Microsoft.DotNet.GenFacades
- Microsoft.DotNet.Helix.Sdk
- Microsoft.DotNet.RemoteExecutor
- Microsoft.DotNet.XUnitV3Extensions
From 11.0.0-rc.1.26424.125 to 11.0.0-rc.1.26451.109
- Microsoft.NET.Sdk.IL
- Microsoft.NETCore.App.Ref
- Microsoft.NETCore.ILAsm
- Microsoft.NETCore.ILDAsm
- Microsoft.Win32.SystemEvents
- runtime.win-x64.Microsoft.NETCore.ILAsm
- runtime.win-x86.Microsoft.NETCore.ILAsm
- System.CodeDom
- System.Configuration.ConfigurationManager
- System.Diagnostics.DiagnosticSource
- System.Formats.Nrbf
- System.IO.Hashing
- System.Reflection.MetadataLoadContext
- System.Resources.Extensions
- System.Runtime.Serialization.Formatters
- System.Text.Encodings.Web
- System.Text.Json
- System.Windows.Extensions

Associated changes in source repos

Diff the source with this PR branch

darc vmr diff --name-only https://github.com/dotnet/dotnet:f2b969981e123579eb8a779dc05aa8138569dff9..https://github.com/dotnet/winforms:darc-main-27d48641-1bea-4984-8c45-a48aafe77695

Microsoft Reviewers: Open in CodeFlow

Updated Dependencies: Microsoft.DotNet.Arcade.Sdk, Microsoft.DotNet.Build.Tasks.Templating, Microsoft.DotNet.CMake.Sdk, Microsoft.DotNet.GenFacades, Microsoft.DotNet.Helix.Sdk, Microsoft.DotNet.RemoteExecutor, Microsoft.DotNet.XUnitV3Extensions (Version 11.0.0-beta.26424.125 -> 11.0.0-beta.26451.109) Microsoft.NET.Sdk.IL, Microsoft.NETCore.App.Ref, Microsoft.NETCore.ILAsm, Microsoft.NETCore.ILDAsm, Microsoft.Win32.SystemEvents, runtime.win-x64.Microsoft.NETCore.ILAsm, System.CodeDom, System.Configuration.ConfigurationManager, System.Diagnostics.DiagnosticSource, System.Formats.Nrbf, System.IO.Hashing, System.Reflection.MetadataLoadContext, System.Resources.Extensions, System.Runtime.Serialization.Formatters, System.Text.Encodings.Web, System.Text.Json, System.Windows.Extensions, runtime.win-x86.Microsoft.NETCore.ILAsm (Version 11.0.0-rc.1.26424.125 -> 11.0.0-rc.1.26451.109) [[ commit created by automation ]]

dotnet-maestro · 2026-09-02T02:12:34Z

Note

VMR PRs included in this codeflow update:

💡 You may consult the FAQ for more information or tag @dotnet/prodconsvcs for assistance.

dotnet-policy-service

Go, you big red fire engine!

LeafShi1 · 2026-09-02T05:55:22Z

The build failed with System.TypeInitializationException : The type initializer for 'Coverlet.Core.Instrumentation.Tracker.Microsoft.Private.Windows.Polyfills.Tests_d6550c7c-fd38-4022-a909-2613cf55c4ed' threw an exception. ---- System.IO.FileNotFoundException : Could not load file or assembly 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

LeafShi1 · 2026-09-02T05:56:36Z

/azp run

azure-pipelines · 2026-09-02T05:56:48Z

Azure Pipelines: Successfully started running 1 pipeline(s).

Shyam-Gupta · 2026-09-02T23:59:21Z

The build failed with System.TypeInitializationException : The type initializer for 'Coverlet.Core.Instrumentation.Tracker.Microsoft.Private.Windows.Polyfills.Tests_d6550c7c-fd38-4022-a909-2613cf55c4ed' threw an exception. ---- System.IO.FileNotFoundException : Could not load file or assembly 'System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

I have disabled code coverage for net481 project to fix this issue. With latest update, code coverage host is not able to load System.Runtime v8.

codecov · 2026-09-03T00:21:21Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.24166%. Comparing base (1dfc02d) to head (b85cbad).
⚠️ Report is 190 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (1dfc02d) and HEAD (b85cbad). Click for more details.

HEAD has 3 uploads less than BASE

Flag BASE (1dfc02d) HEAD (b85cbad)

Debug 3 2

production 2 1

integration 1 0

Additional details and impacted files

@@                 Coverage Diff                  @@
##                main      #15025          +/-   ##
====================================================
- Coverage   77.31435%   37.24166%   -40.07269%     
====================================================
  Files           3265         246        -3019     
  Lines         644447        9774      -634673     
  Branches       47631        1029       -46602     
====================================================
- Hits          498250        3640      -494610     
+ Misses        142509        5970      -136539     
+ Partials        3688         164        -3524

Flag	Coverage Δ
Debug	`37.24166% <ø> (-40.07270%)`	⬇️
integration	`?`
production	`39.36526% <ø> (-12.91627%)`	⬇️
test	`20.64923% <ø> (-76.76994%)`	⬇️
unit	`39.36526% <ø> (-10.26895%)`	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

🚀 New features to boost your workflow:

❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

Shyam-Gupta · 2026-09-03T00:43:14Z

Issue: Debug/x64 PR builds fail at test execution, every test in net481 leg throwing:

TypeInitializationException : The type initializer for
'Coverlet.Core.Instrumentation.Tracker.Microsoft.Private.Windows.Polyfills.Tests_' threw an exception.
---- FileNotFoundException : Could not load file or assembly 'System.Runtime, Version=8.0.0.0'

Only this leg is affected because build-PR.yml enables Coverage solely for public Debug x64.

Root cause

Commit #14371 bumped CoverletMSBuildPackageVersion 6.0.0 → 8.0.0. Coverlet 8.0.0 picks its task assembly by MSBuild host, not target framework — under dotnet build it loads tasks\net8.0\coverlet.core.dll, which references System.Runtime 8.0.0.0. The instrumenter copies its tracker IL from that assembly into the assembly under test, so the tracker injected into our net481 test assembly carries a reference .NET Framework can't resolve.

Upstream bug, not intentional: coverlet#1818.

Temporary fix:

Disable code coverage for net481 target.

Directory.Build.props :

false

Tests still build and run; only .NET Framework coverage collection is skipped. No real loss — that leg was producing a red build and zero valid data.

Change needed once coverlet fixes this

Every coverlet release after 6.x is still broken for .NET Framework (8.0.1 → no coverage reported, #1842; 10.0.1 → different TypeInitializationException , #2009). Wait for coverlet #1985 (silent zero coverage) and #2010 (10.0.1 tracker crash) to ship, then:

Update CoverletMSBuildPackageVersion in eng/Versions.props .
Delete the CollectCoverage override and its comment from Directory.Build.props .
Confirm a net481 .coverage file is actually produced under artifacts\bin...\coverage\

cc: @KlausLoeffelmann. @mcastro-x

Shyam-Gupta · 2026-09-03T00:50:40Z

Logged bug #15030 to track this issue.

dotnet-maestro · 2026-09-03T02:14:35Z

Important

While this PR was open, the source repository has received code changes from this repository (an opposite codeflow merged).
To avoid complex conflicts, the codeflow cannot continue until this PR is closed or merged.

You can continue with one of the following options:

Ignore this and merge this PR as usual without waiting for the new changes.
Once merged, Maestro will create a new codeflow PR with the new changes.
Close this PR and wait for Maestro to open a new one with old and new changes included.
You will lose any manual changes made in this PR.
You can also manually trigger the new codeflow right away by running:
```
darc trigger-subscriptions --id 81d064a4-929c-4152-b746-ee3acc24b4ed
```
Force a codeflow into this PR at your own risk if you want the new changes.
User commits made to this PR might be reverted.
```
darc trigger-subscriptions --id 81d064a4-929c-4152-b746-ee3acc24b4ed --force
```

💡 You may consult the FAQ for more information or tag @dotnet/prodconsvcs for assistance.

[main] Source code updates from dotnet/dotnet - Disabiling code coverage for net481. - Updated comment.

dotnet-maestro Bot requested a review from a team as a code owner September 2, 2026 02:12

dotnet-policy-service Bot approved these changes Sep 2, 2026

View reviewed changes

Disabiling code coverage for net481.

c409e72

Updated comment.

b85cbad

Shyam-Gupta approved these changes Sep 3, 2026

View reviewed changes

yaqiyang approved these changes Sep 3, 2026

View reviewed changes

dotnet-maestro Bot merged commit 9cf27ae into main Sep 3, 2026
14 checks passed

dotnet-maestro Bot deleted the darc-main-27d48641-1bea-4984-8c45-a48aafe77695 branch September 3, 2026 07:13

abineshPalanisamy pushed a commit to abineshPalanisamy/winforms that referenced this pull request Sep 3, 2026

[main] Source code updates from dotnet/dotnet (dotnet#15025)

3b9b9ea

[main] Source code updates from dotnet/dotnet - Disabiling code coverage for net481. - Updated comment.

dotnet-maestro Bot mentioned this pull request Sep 4, 2026

[main] Source code updates from dotnet/winforms dotnet/dotnet#9041

Merged

dotnet-milestone-bot Bot added this to the 12.0-preview1 milestone Sep 4, 2026

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[main] Source code updates from dotnet/dotnet - #15025

[main] Source code updates from dotnet/dotnet#15025
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From https://github.com/dotnet/dotnet

Associated changes in source repos

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