[manual] Merge release/9.0-staging into release/9.0 - #133988
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…ts (dotnet#132118) Backport of dotnet#131955 to release/9.0-staging /cc @mrek-msft @Copilot ## Customer Impact - [ ] Customer reported - [ ] Found internally [Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.] ## Regression - [ ] Yes - [ ] No [If yes, specify when the regression was introduced. Provide the PR or commit if known.] ## Testing [How was the fix verified? How was the issue missed previously? What tests were added?] ## Risk [High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.] **IMPORTANT**: If this backport is for a servicing release, please verify that: - For .NET 8 and .NET 9: The PR target branch is `release/X.0-staging`, not `release/X.0`. - For .NET 10+: The PR target branch is `release/X.0` (no `-staging` suffix). ## Package authoring no longer needed in .NET 9 **IMPORTANT**: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version. Keep in mind that we still need package authoring in .NET 8 and older versions. Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com> Co-authored-by: eiriktsarpalis <2813363+eiriktsarpalis@users.noreply.github.com>
) This pull request updates the following dependencies [marker]: <> (Begin:5e3f9b88-faad-436c-a580-ac009d20bb33) ## From https://github.com/dotnet/icu - **Subscription**: [5e3f9b88-faad-436c-a580-ac009d20bb33](https://maestro.dot.net/subscriptions?search=5e3f9b88-faad-436c-a580-ac009d20bb33) - **Build**: [20260818.3](https://dev.azure.com/dnceng/internal/_build/results?buildId=3050632) ([327525](https://maestro.dot.net/channel/3883/github:dotnet:icu/build/327525)) - **Date Produced**: August 18, 2026 9:48:57 AM UTC - **Commit**: [b5d4ef3905750a52e02bb4336aa28eaf6d9ccbbd](dotnet/icu@b5d4ef3) - **Branch**: [dotnet/release/9.0](https://github.com/dotnet/icu/tree/dotnet/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-rtm.26407.5 to 9.0.0-rtm.26418.3][3] - Microsoft.NETCore.Runtime.ICU.Transport [3]: dotnet/icu@9adc457...b5d4ef3 [DependencyUpdate]: <> (End) [marker]: <> (End:5e3f9b88-faad-436c-a580-ac009d20bb33) --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…32196) This pull request updates the following dependencies [marker]: <> (Begin:b609d3b5-ab6f-473c-9ce1-f266baef16fc) ## From https://github.com/dotnet/cecil - **Subscription**: [b609d3b5-ab6f-473c-9ce1-f266baef16fc](https://maestro.dot.net/subscriptions?search=b609d3b5-ab6f-473c-9ce1-f266baef16fc) - **Build**: [20260818.4](https://dev.azure.com/dnceng/internal/_build/results?buildId=3050655) ([327519](https://maestro.dot.net/channel/3883/github:dotnet:cecil/build/327519)) - **Date Produced**: August 18, 2026 9:20:45 AM UTC - **Commit**: [5850baac30805f358b113f0b12966ce234023725](dotnet/cecil@5850baa) - **Branch**: [release/9.0](https://github.com/dotnet/cecil/tree/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [0.11.5-alpha.26404.3 to 0.11.5-alpha.26418.4][2] - Microsoft.SourceBuild.Intermediate.cecil - Microsoft.DotNet.Cecil [2]: dotnet/cecil@eebca36...5850baa [DependencyUpdate]: <> (End) [marker]: <> (End:b609d3b5-ab6f-473c-9ce1-f266baef16fc) --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…t#132384) This pull request updates the following dependencies [marker]: <> (Begin:077f423f-1332-4108-a2ea-08dcc66548e6) ## From https://github.com/dotnet/xharness - **Subscription**: [077f423f-1332-4108-a2ea-08dcc66548e6](https://maestro.dot.net/subscriptions?search=077f423f-1332-4108-a2ea-08dcc66548e6) - **Build**: [20260813.1](https://dev.azure.com/dnceng/internal/_build/results?buildId=3047095) ([326983](https://maestro.dot.net/channel/2/github:dotnet:xharness/build/326983)) - **Date Produced**: August 13, 2026 2:34:21 PM UTC - **Commit**: [f10844a1593bd12a5b59046798831ead3eeef2e0](dotnet/xharness@f10844a) - **Branch**: [main](https://github.com/dotnet/xharness/tree/main) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [11.0.0-prerelease.26370.1 to 11.0.0-prerelease.26413.1][1] - Microsoft.DotNet.XHarness.CLI - Microsoft.DotNet.XHarness.TestRunners.Common - Microsoft.DotNet.XHarness.TestRunners.Xunit [1]: dotnet/xharness@65e5795...f10844a [DependencyUpdate]: <> (End) [marker]: <> (End:077f423f-1332-4108-a2ea-08dcc66548e6) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…132447) This pull request updates the following dependencies [marker]: <> (Begin:60694bfc-fbc6-40d6-af1a-4c5dac51a701) ## From https://github.com/dotnet/roslyn - **Subscription**: [60694bfc-fbc6-40d6-af1a-4c5dac51a701](https://maestro.dot.net/subscriptions?search=60694bfc-fbc6-40d6-af1a-4c5dac51a701) - **Build**: [20260817.1](https://dev.azure.com/dnceng/internal/_build/results?buildId=3049659) ([327380](https://maestro.dot.net/channel/4906/github:dotnet:roslyn/build/327380)) - **Date Produced**: August 17, 2026 9:41:52 AM UTC - **Commit**: [6daa7d78d6d38698bcdb78579b083a4bf7abcb0d](dotnet/roslyn@6daa7d7) - **Branch**: [release/dev17.12](https://github.com/dotnet/roslyn/tree/release/dev17.12) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [4.12.0-3.26274.2 to 4.12.0-3.26417.1][1] - Microsoft.SourceBuild.Intermediate.roslyn - Microsoft.CodeAnalysis - Microsoft.CodeAnalysis.CSharp - Microsoft.Net.Compilers.Toolset [1]: dotnet/roslyn@0118715...6daa7d7 [DependencyUpdate]: <> (End) [marker]: <> (End:60694bfc-fbc6-40d6-af1a-4c5dac51a701) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
) This pull request updates the following dependencies [marker]: <> (Begin:5e3f9b88-faad-436c-a580-ac009d20bb33) ## From https://github.com/dotnet/icu - **Subscription**: [5e3f9b88-faad-436c-a580-ac009d20bb33](https://maestro.dot.net/subscriptions?search=5e3f9b88-faad-436c-a580-ac009d20bb33) - **Build**: [20260819.1](https://dev.azure.com/dnceng/internal/_build/results?buildId=3051736) ([327713](https://maestro.dot.net/channel/3883/github:dotnet:icu/build/327713)) - **Date Produced**: August 19, 2026 9:59:36 AM UTC - **Commit**: [95c53f5781a311c8fe5e2a55c24ed2ab18f89a45](dotnet/icu@95c53f5) - **Branch**: [dotnet/release/9.0](https://github.com/dotnet/icu/tree/dotnet/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-rtm.26418.3 to 9.0.0-rtm.26419.1][1] - Microsoft.NETCore.Runtime.ICU.Transport [1]: dotnet/icu@b5d4ef3...95c53f5 [DependencyUpdate]: <> (End) [marker]: <> (End:5e3f9b88-faad-436c-a580-ac009d20bb33) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…132110) This pull request updates the following dependencies [marker]: <> (Begin:943c2154-7e47-4fed-bb40-3e772747daf7) ## From https://github.com/dotnet/arcade - **Subscription**: [943c2154-7e47-4fed-bb40-3e772747daf7](https://maestro.dot.net/subscriptions?search=943c2154-7e47-4fed-bb40-3e772747daf7) - **Build**: [20260820.3](https://dev.azure.com/dnceng/internal/_build/results?buildId=3053001) ([327905](https://maestro.dot.net/channel/5175/github:dotnet:arcade/build/327905)) - **Date Produced**: August 20, 2026 4:39:32 PM UTC - **Commit**: [1236e274211c2405924a61dcb3a92a0ae99f91c8](dotnet/arcade@1236e27) - **Branch**: [release/9.0](https://github.com/dotnet/arcade/tree/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-beta.26406.11 to 9.0.0-beta.26420.3][4] - Microsoft.SourceBuild.Intermediate.arcade - Microsoft.DotNet.Arcade.Sdk - Microsoft.DotNet.Build.Tasks.Archives - Microsoft.DotNet.Build.Tasks.Feed - Microsoft.DotNet.Build.Tasks.Installers - Microsoft.DotNet.Build.Tasks.Packaging - Microsoft.DotNet.Build.Tasks.TargetFramework - Microsoft.DotNet.Build.Tasks.Templating - Microsoft.DotNet.Build.Tasks.Workloads - Microsoft.DotNet.CodeAnalysis - Microsoft.DotNet.GenAPI - Microsoft.DotNet.GenFacades - Microsoft.DotNet.Helix.Sdk - Microsoft.DotNet.PackageTesting - Microsoft.DotNet.RemoteExecutor - Microsoft.DotNet.SharedFramework.Sdk - Microsoft.DotNet.VersionTools.Tasks - Microsoft.DotNet.XliffTasks - Microsoft.DotNet.XUnitExtensions - From [2.9.0-beta.26406.11 to 2.9.0-beta.26420.3][4] - Microsoft.DotNet.XUnitAssert - Microsoft.DotNet.XUnitConsoleRunner [4]: dotnet/arcade@f3bffca...1236e27 [DependencyUpdate]: <> (End) [marker]: <> (End:943c2154-7e47-4fed-bb40-3e772747daf7) --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com> Co-authored-by: MichalZ <188900745+mrek-msft@users.noreply.github.com>
…et#132254) I detected changes in the release/9.0 branch which have not been merged yet to release/9.0-staging. I'm a robot and am configured to help you automatically keep release/9.0-staging up to date, so I've opened this PR. This PR merges commits made on release/9.0 by the following committers: * dotnet-bot ## Instructions for merging from UI This PR will not be auto-merged. When pull request checks pass, complete this PR by creating a merge commit, *not* a squash or rebase commit. <img alt="merge button instructions" src="https://i.imgur.com/GepcNJV.png" width="300" /> If this repo does not allow creating merge commits from the GitHub UI, use command line instructions. ## Instructions for merging via command line Run these commands to merge this pull request from the command line. ``` sh git fetch git checkout release/9.0 git pull --ff-only git checkout release/9.0-staging git pull --ff-only git merge --no-ff release/9.0 # If there are merge conflicts, resolve them and then run git merge --continue to complete the merge # Pushing the changes to the PR branch will re-trigger PR validation. git push https://github.com/dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git push git@github.com:dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` </details> After PR checks are complete push the branch ``` git push ``` ## Instructions for resolving conflicts :warning: If there are merge conflicts, you will need to resolve them manually before merging. You can do this [using GitHub][resolve-github] or using the [command line][resolve-cli]. [resolve-github]: https://help.github.com/articles/resolving-a-merge-conflict-on-github/ [resolve-cli]: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ ## Instructions for updating this pull request Contributors to this repo have permission update this pull request by pushing to the branch 'merge/release/9.0-to-release/9.0-staging'. This can be done to resolve conflicts or make other changes to this pull request before it is merged. The provided examples assume that the remote is named 'origin'. If you have a different remote name, please replace 'origin' with the name of your remote. ``` git fetch git checkout -b merge/release/9.0-to-release/9.0-staging origin/release/9.0-staging git pull https://github.com/dotnet/runtime merge/release/9.0-to-release/9.0-staging (make changes) git commit -m "Updated PR with my changes" git push https://github.com/dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git fetch git checkout -b merge/release/9.0-to-release/9.0-staging origin/release/9.0-staging git pull git@github.com:dotnet/runtime merge/release/9.0-to-release/9.0-staging (make changes) git commit -m "Updated PR with my changes" git push git@github.com:dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` </details> Contact .NET Core Engineering (dotnet/dnceng) if you have questions or issues. Also, if this PR was generated incorrectly, help us fix it. See https://github.com/dotnet/arcade/blob/main/.github/workflows/scripts/inter-branch-merge.ps1.
…ng oversized Content-Length cases to managed implementation (dotnet#132652) Backport of dotnet#132321 to release/9.0-staging /cc @akoeplinger @alinpahontu2912 ## Customer Impact - [ ] Customer reported - [ ] Found internally [Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.] ## Regression - [ ] Yes - [ ] No [If yes, specify when the regression was introduced. Provide the PR or commit if known.] ## Testing [How was the fix verified? How was the issue missed previously? What tests were added?] ## Risk [High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.] **IMPORTANT**: If this backport is for a servicing release, please verify that: - For .NET 8 and .NET 9: The PR target branch is `release/X.0-staging`, not `release/X.0`. - For .NET 10+: The PR target branch is `release/X.0` (no `-staging` suffix). ## Package authoring no longer needed in .NET 9 **IMPORTANT**: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version. Keep in mind that we still need package authoring in .NET 8 and older versions. Co-authored-by: Stefan-Alin Pahontu <56953855+alinpahontu2912@users.noreply.github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Irem Yuksel <113098562+iremyux@users.noreply.github.com> Copilot-Session: bcc5e304-cc27-44b0-aac3-b9eada42d13f
…132649) This pull request updates the following dependencies [marker]: <> (Begin:60694bfc-fbc6-40d6-af1a-4c5dac51a701) ## From https://github.com/dotnet/roslyn - **Subscription**: [60694bfc-fbc6-40d6-af1a-4c5dac51a701](https://maestro.dot.net/subscriptions?search=60694bfc-fbc6-40d6-af1a-4c5dac51a701) - **Build**: [20260823.8](https://dev.azure.com/dnceng/internal/_build/results?buildId=3055111) ([328235](https://maestro.dot.net/channel/4906/github:dotnet:roslyn/build/328235)) - **Date Produced**: August 23, 2026 10:46:19 AM UTC - **Commit**: [66541625d45561161a206b6aad528b9c95c43259](dotnet/roslyn@6654162) - **Branch**: [release/dev17.12](https://github.com/dotnet/roslyn/tree/release/dev17.12) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [4.12.0-3.26417.1 to 4.12.0-3.26423.8][2] - Microsoft.SourceBuild.Intermediate.roslyn - Microsoft.CodeAnalysis - Microsoft.CodeAnalysis.CSharp - Microsoft.Net.Compilers.Toolset [2]: dotnet/roslyn@6daa7d7...6654162 [DependencyUpdate]: <> (End) [marker]: <> (End:60694bfc-fbc6-40d6-af1a-4c5dac51a701) --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…132679) This pull request updates the following dependencies [marker]: <> (Begin:943c2154-7e47-4fed-bb40-3e772747daf7) ## From https://github.com/dotnet/arcade - **Subscription**: [943c2154-7e47-4fed-bb40-3e772747daf7](https://maestro.dot.net/subscriptions?search=943c2154-7e47-4fed-bb40-3e772747daf7) - **Build**: [20260823.5](https://dev.azure.com/dnceng/internal/_build/results?buildId=3055308) ([328252](https://maestro.dot.net/channel/5175/github:dotnet:arcade/build/328252)) - **Date Produced**: August 23, 2026 6:34:17 PM UTC - **Commit**: [d9d97de241d6e2bc5cce12d9e7f54e8d19ca67dc](dotnet/arcade@d9d97de) - **Branch**: [release/9.0](https://github.com/dotnet/arcade/tree/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-beta.26420.3 to 9.0.0-beta.26423.5][1] - Microsoft.SourceBuild.Intermediate.arcade - Microsoft.DotNet.Arcade.Sdk - Microsoft.DotNet.Build.Tasks.Archives - Microsoft.DotNet.Build.Tasks.Feed - Microsoft.DotNet.Build.Tasks.Installers - Microsoft.DotNet.Build.Tasks.Packaging - Microsoft.DotNet.Build.Tasks.TargetFramework - Microsoft.DotNet.Build.Tasks.Templating - Microsoft.DotNet.Build.Tasks.Workloads - Microsoft.DotNet.CodeAnalysis - Microsoft.DotNet.GenAPI - Microsoft.DotNet.GenFacades - Microsoft.DotNet.Helix.Sdk - Microsoft.DotNet.PackageTesting - Microsoft.DotNet.RemoteExecutor - Microsoft.DotNet.SharedFramework.Sdk - Microsoft.DotNet.VersionTools.Tasks - Microsoft.DotNet.XliffTasks - Microsoft.DotNet.XUnitExtensions - From [2.9.0-beta.26420.3 to 2.9.0-beta.26423.5][1] - Microsoft.DotNet.XUnitAssert - Microsoft.DotNet.XUnitConsoleRunner [1]: dotnet/arcade@1236e27...d9d97de [DependencyUpdate]: <> (End) [marker]: <> (End:943c2154-7e47-4fed-bb40-3e772747daf7) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…t#132683) This pull request updates the following dependencies [marker]: <> (Begin:077f423f-1332-4108-a2ea-08dcc66548e6) ## From https://github.com/dotnet/xharness - **Subscription**: [077f423f-1332-4108-a2ea-08dcc66548e6](https://maestro.dot.net/subscriptions?search=077f423f-1332-4108-a2ea-08dcc66548e6) - **Build**: [20260819.1](https://dev.azure.com/dnceng/internal/_build/results?buildId=3051693) ([327705](https://maestro.dot.net/channel/2/github:dotnet:xharness/build/327705)) - **Date Produced**: August 19, 2026 8:47:15 AM UTC - **Commit**: [8dd9b8e6004e22c7b120af0631f0809865ff2088](dotnet/xharness@8dd9b8e) - **Branch**: [main](https://github.com/dotnet/xharness/tree/main) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [11.0.0-prerelease.26413.1 to 11.0.0-prerelease.26419.1][1] - Microsoft.DotNet.XHarness.CLI - Microsoft.DotNet.XHarness.TestRunners.Common - Microsoft.DotNet.XHarness.TestRunners.Xunit [1]: dotnet/xharness@f10844a...8dd9b8e [DependencyUpdate]: <> (End) [marker]: <> (End:077f423f-1332-4108-a2ea-08dcc66548e6) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…132872) This pull request updates the following dependencies [marker]: <> (Begin:943c2154-7e47-4fed-bb40-3e772747daf7) ## From https://github.com/dotnet/arcade - **Subscription**: [943c2154-7e47-4fed-bb40-3e772747daf7](https://maestro.dot.net/subscriptions?search=943c2154-7e47-4fed-bb40-3e772747daf7) - **Build**: [20260831.8](https://dev.azure.com/dnceng/internal/_build/results?buildId=3062499) ([329601](https://maestro.dot.net/channel/5175/github:dotnet:arcade/build/329601)) - **Date Produced**: September 1, 2026 12:37:14 AM UTC - **Commit**: [ee364d8268f86d6a2ab859f6cc82ca6f9d20b31c](dotnet/arcade@ee364d8) - **Branch**: [release/9.0](https://github.com/dotnet/arcade/tree/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-beta.26423.5 to 9.0.0-beta.26431.8][3] - Microsoft.SourceBuild.Intermediate.arcade - Microsoft.DotNet.Arcade.Sdk - Microsoft.DotNet.Build.Tasks.Archives - Microsoft.DotNet.Build.Tasks.Feed - Microsoft.DotNet.Build.Tasks.Installers - Microsoft.DotNet.Build.Tasks.Packaging - Microsoft.DotNet.Build.Tasks.TargetFramework - Microsoft.DotNet.Build.Tasks.Templating - Microsoft.DotNet.Build.Tasks.Workloads - Microsoft.DotNet.CodeAnalysis - Microsoft.DotNet.GenAPI - Microsoft.DotNet.GenFacades - Microsoft.DotNet.Helix.Sdk - Microsoft.DotNet.PackageTesting - Microsoft.DotNet.RemoteExecutor - Microsoft.DotNet.SharedFramework.Sdk - Microsoft.DotNet.VersionTools.Tasks - Microsoft.DotNet.XliffTasks - Microsoft.DotNet.XUnitExtensions - From [2.9.0-beta.26423.5 to 2.9.0-beta.26431.8][3] - Microsoft.DotNet.XUnitAssert - Microsoft.DotNet.XUnitConsoleRunner [3]: dotnet/arcade@d9d97de...ee364d8 [DependencyUpdate]: <> (End) [marker]: <> (End:943c2154-7e47-4fed-bb40-3e772747daf7) --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
Backport of dotnet#133097 to release/9.0-staging. Fixes dotnet#133096. ## Customer Impact - [ ] Customer reported - [X] Found internally Customers would be unable to establish QUIC or HTTP/3 connections on Linux without providing the target host name (to verify against the server certificate). ## Regression - [X] Yes - [ ] No Regression by updating MsQuic (optional dependency to light-up QUIC support) ## Testing Affected tests succeed on CI. ## Risk Low, change is small and well understood. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
…ENTIALS in QUIC (dotnet#133078) Backport of dotnet#132832 to release/9.0 /cc @rzikm ## Customer Impact - [ ] Customer reported - [x] Found internally A recent update in MsQuic changed an error code returned when applicaiton attempted to use certificates with ephemeral keys (Windows-only concept where keys are not persisted in a key store, Schannel, the TLS provider on Windows does not work with such certificates). This causes to a hard-to-diagnose exception being surfaced to .NET application. This change: - fixes the error detection so that more helpful diagnostic exception is surfaced - fixes test failures to de-noise CI. ## Regression - [X] Yes - [ ] No Regression was introduced by updating MsQuic to the latest version. ## Testing verified in CI. ## Risk Low, the fix is contained and well understood. Co-authored-by: Radek Zikmund <32671551+rzikm@users.noreply.github.com> Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Backport of dotnet#133027 to release/9.0-staging /cc @jozkee ## Customer Impact - [ ] Customer reported - [x] Found internally ## Regression - [x] Yes - affecting .NET 9+ - [ ] No ## Testing Regression tests added; .NET runtime CI is passing. ## Risk Low. The fix extends the existing byte-by-byte comparison to cases where the incoming name fits within the key prefix but the cached name does not. **IMPORTANT**: If this backport is for a servicing release, please verify that: - For .NET 8 and .NET 9: The PR target branch is `release/X.0-staging`, not `release/X.0`. - For .NET 10+: The PR target branch is `release/X.0` (no `-staging` suffix). ## Package authoring no longer needed in .NET 9 **IMPORTANT**: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version. Keep in mind that we still need package authoring in .NET 8 and older versions. Co-authored-by: David Cantú <dacantu@microsoft.com>
…et#133102) I detected changes in the release/9.0 branch which have not been merged yet to release/9.0-staging. I'm a robot and am configured to help you automatically keep release/9.0-staging up to date, so I've opened this PR. This PR merges commits made on release/9.0 by the following committers: * vseanreesermsft ## Instructions for merging from UI This PR will not be auto-merged. When pull request checks pass, complete this PR by creating a merge commit, *not* a squash or rebase commit. <img alt="merge button instructions" src="https://i.imgur.com/GepcNJV.png" width="300" /> If this repo does not allow creating merge commits from the GitHub UI, use command line instructions. ## Instructions for merging via command line Run these commands to merge this pull request from the command line. ``` sh git fetch git checkout release/9.0 git pull --ff-only git checkout release/9.0-staging git pull --ff-only git merge --no-ff release/9.0 # If there are merge conflicts, resolve them and then run git merge --continue to complete the merge # Pushing the changes to the PR branch will re-trigger PR validation. git push https://github.com/dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git push git@github.com:dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` </details> After PR checks are complete push the branch ``` git push ``` ## Instructions for resolving conflicts :warning: If there are merge conflicts, you will need to resolve them manually before merging. You can do this [using GitHub][resolve-github] or using the [command line][resolve-cli]. [resolve-github]: https://help.github.com/articles/resolving-a-merge-conflict-on-github/ [resolve-cli]: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ ## Instructions for updating this pull request Contributors to this repo have permission update this pull request by pushing to the branch 'merge/release/9.0-to-release/9.0-staging'. This can be done to resolve conflicts or make other changes to this pull request before it is merged. The provided examples assume that the remote is named 'origin'. If you have a different remote name, please replace 'origin' with the name of your remote. ``` git fetch git checkout -b merge/release/9.0-to-release/9.0-staging origin/release/9.0-staging git pull https://github.com/dotnet/runtime merge/release/9.0-to-release/9.0-staging (make changes) git commit -m "Updated PR with my changes" git push https://github.com/dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git fetch git checkout -b merge/release/9.0-to-release/9.0-staging origin/release/9.0-staging git pull git@github.com:dotnet/runtime merge/release/9.0-to-release/9.0-staging (make changes) git commit -m "Updated PR with my changes" git push git@github.com:dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` </details> Contact .NET Core Engineering (dotnet/dnceng) if you have questions or issues. Also, if this PR was generated incorrectly, help us fix it. See https://github.com/dotnet/arcade/blob/main/.github/workflows/scripts/inter-branch-merge.ps1.
) This pull request updates the following dependencies [marker]: <> (Begin:5e3f9b88-faad-436c-a580-ac009d20bb33) ## From https://github.com/dotnet/icu - **Subscription**: [5e3f9b88-faad-436c-a580-ac009d20bb33](https://maestro.dot.net/subscriptions?search=5e3f9b88-faad-436c-a580-ac009d20bb33) - **Build**: [20260907.4](https://dev.azure.com/dnceng/internal/_build/results?buildId=3068613) ([330778](https://maestro.dot.net/channel/3883/github:dotnet:icu/build/330778)) - **Date Produced**: September 7, 2026 11:44:06 AM UTC - **Commit**: [9e37504e53c5d4dfa132694995ba54944174eaf6](dotnet/icu@9e37504) - **Branch**: [dotnet/release/9.0](https://github.com/dotnet/icu/tree/dotnet/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-rtm.26419.1 to 9.0.0-rtm.26457.4][1] - Microsoft.NETCore.Runtime.ICU.Transport [1]: dotnet/icu@95c53f5...9e37504 [DependencyUpdate]: <> (End) [marker]: <> (End:5e3f9b88-faad-436c-a580-ac009d20bb33) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
) This pull request updates the following dependencies [marker]: <> (Begin:5e3f9b88-faad-436c-a580-ac009d20bb33) ## From https://github.com/dotnet/icu - **Subscription**: [5e3f9b88-faad-436c-a580-ac009d20bb33](https://maestro.dot.net/subscriptions?search=5e3f9b88-faad-436c-a580-ac009d20bb33) - **Build**: [20260908.1](https://dev.azure.com/dnceng/internal/_build/results?buildId=3069443) ([330907](https://maestro.dot.net/channel/3883/github:dotnet:icu/build/330907)) - **Date Produced**: September 8, 2026 9:30:41 AM UTC - **Commit**: [e38cd61cc00b753af76ed9d31a7acbeabc6a3238](dotnet/icu@e38cd61) - **Branch**: [dotnet/release/9.0](https://github.com/dotnet/icu/tree/dotnet/release/9.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [9.0.0-rtm.26457.4 to 9.0.0-rtm.26458.1][1] - Microsoft.NETCore.Runtime.ICU.Transport [1]: dotnet/icu@9e37504...e38cd61 [DependencyUpdate]: <> (End) [marker]: <> (End:5e3f9b88-faad-436c-a580-ac009d20bb33) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
…et#133620) I detected changes in the release/9.0 branch which have not been merged yet to release/9.0-staging. I'm a robot and am configured to help you automatically keep release/9.0-staging up to date, so I've opened this PR. This PR merges commits made on release/9.0 by the following committers: * ViveliDuCh * dotnet-bot * vseanreesermsft * iremyux ## Instructions for merging from UI This PR will not be auto-merged. When pull request checks pass, complete this PR by creating a merge commit, *not* a squash or rebase commit. <img alt="merge button instructions" src="https://i.imgur.com/GepcNJV.png" width="300" /> If this repo does not allow creating merge commits from the GitHub UI, use command line instructions. ## Instructions for merging via command line Run these commands to merge this pull request from the command line. ``` sh git fetch git checkout release/9.0 git pull --ff-only git checkout release/9.0-staging git pull --ff-only git merge --no-ff release/9.0 # If there are merge conflicts, resolve them and then run git merge --continue to complete the merge # Pushing the changes to the PR branch will re-trigger PR validation. git push https://github.com/dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git push git@github.com:dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` </details> After PR checks are complete push the branch ``` git push ``` ## Instructions for resolving conflicts :warning: If there are merge conflicts, you will need to resolve them manually before merging. You can do this [using GitHub][resolve-github] or using the [command line][resolve-cli]. [resolve-github]: https://help.github.com/articles/resolving-a-merge-conflict-on-github/ [resolve-cli]: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ ## Instructions for updating this pull request Contributors to this repo have permission update this pull request by pushing to the branch 'merge/release/9.0-to-release/9.0-staging'. This can be done to resolve conflicts or make other changes to this pull request before it is merged. The provided examples assume that the remote is named 'origin'. If you have a different remote name, please replace 'origin' with the name of your remote. ``` git fetch git checkout -b merge/release/9.0-to-release/9.0-staging origin/release/9.0-staging git pull https://github.com/dotnet/runtime merge/release/9.0-to-release/9.0-staging (make changes) git commit -m "Updated PR with my changes" git push https://github.com/dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git fetch git checkout -b merge/release/9.0-to-release/9.0-staging origin/release/9.0-staging git pull git@github.com:dotnet/runtime merge/release/9.0-to-release/9.0-staging (make changes) git commit -m "Updated PR with my changes" git push git@github.com:dotnet/runtime HEAD:merge/release/9.0-to-release/9.0-staging ``` </details> Contact .NET Core Engineering (dotnet/dnceng) if you have questions or issues. Also, if this PR was generated incorrectly, help us fix it. See https://github.com/dotnet/arcade/blob/main/.github/workflows/scripts/inter-branch-merge.ps1.
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🔵 Needs a closer look
The release merge spans runtime behavior, tests, dependencies, and tooling and warrants final human review.
Pull request overview
Merges release/9.0-staging into release/9.0, including runtime fixes, test adjustments, and dependency updates.
Changes:
- Fixes System.Text.Json property-cache collisions.
- Adjusts QUIC SNI and ephemeral-certificate handling.
- Updates tests, dependencies, and XHarness tooling.
File summaries
| File | Description |
|---|---|
src/libraries/System.Text.Json/tests/System.Text.Json.Tests/Serialization/CacheTests.cs |
Adds cache-collision regression coverage. |
src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Metadata/PropertyRef.cs |
Corrects property-name equality checks. |
src/libraries/System.Security.Cryptography.Xml/tests/EncryptedXmlTests.cs |
Disables known timing-sensitive tests. |
src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs |
Handles absent SNI values safely. |
src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/MsQuicConfiguration.cs |
Detects additional ephemeral-key failures. |
src/libraries/System.Net.HttpListener/tests/InvalidClientRequestTests.cs |
Limits implementation-specific request cases. |
eng/Versions.props |
Updates dependency versions. |
eng/Version.Details.xml |
Synchronizes dependency versions and commits. |
.config/dotnet-tools.json |
Updates XHarness CLI. |
Review details
- Files reviewed: 9/9 changed files
- Comments generated: 0
- Review effort level: Lite
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mrek-msft
approved these changes
Sep 15, 2026
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/ba-g unrelated infra/flakiness and a known issue tracked by #134011 |
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