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Fix concurrent cache corruption during recursive file-based app upgrades - #788
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slang25 merged 1 commit intoSep 14, 2026
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Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: 25206f71-00e4-4ab7-b185-0045802bb0cb
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🟢 Approval recommended
The focused synchronization fix addresses the reported corruption and includes representative regression coverage.
Pull request overview
Fixes #789 by making shared variable-tracking caches safe during parallel project analysis.
Changes:
- Replaces cache dictionaries with case-insensitive
ConcurrentDictionaryinstances. - Uses thread-safe cache invalidation.
- Adds parallel discovery and update regression coverage.
File summaries
| File | Description |
|---|---|
VariableTrackingService.cs |
Makes shared caches concurrency-safe. |
VariableTrackingServiceTests.cs |
Tests parallel discovery and invalidation. |
Review details
- Files reviewed: 2/2 changed files
- Comments generated: 0
- Review effort level: Balanced
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slang25
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Looks good, thanks @DamianEdwards
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Updated [dotnet-outdated-tool](https://github.com/dotnet-outdated/dotnet-outdated) from 4.8.1 to 4.9.0. <details> <summary>Release notes</summary> _Sourced from [dotnet-outdated-tool's releases](https://github.com/dotnet-outdated/dotnet-outdated/releases)._ ## 4.9.0 ## What's Changed * Adopt MCP 2026-07-28 spec with legacy version negotiation by @slang25 in dotnet-outdated/dotnet-outdated#772 * Fix concurrent cache corruption during recursive file-based app upgrades by @DamianEdwards in dotnet-outdated/dotnet-outdated#788 * Fix: Parameter --maximum-version ignores exact version references by @chefarbeiter in dotnet-outdated/dotnet-outdated#671 * Show a friendly message instead of crashing when a solution has no projects by @DanielC000 in dotnet-outdated/dotnet-outdated#771 * Surface package-upgrade stdout so failures are diagnosable by @timabell in dotnet-outdated/dotnet-outdated#790 * Fix multiline central package version updates by @onuracar-dev in dotnet-outdated/dotnet-outdated#783 * Support versioned MSBuild project SDKs in project files by @thomhurst in dotnet-outdated/dotnet-outdated#793 * Preserve whitespace in Directory.Packages.props during upgrades by @symbiogenesis in dotnet-outdated/dotnet-outdated#803 * Treat package references injected by custom SDKs as auto-referenced by @thomhurst in dotnet-outdated/dotnet-outdated#795 * Preserve version ranges when upgrading packages by @GREsau in dotnet-outdated/dotnet-outdated#702 * Preserve MSBuild version variables across project and props files by @symbiogenesis in dotnet-outdated/dotnet-outdated#805 * Replace McMaster command-line parsing with System.CommandLine by @slang25 in dotnet-outdated/dotnet-outdated#808 * Bump version to 4.9.0 by @slang25 in dotnet-outdated/dotnet-outdated#806 ## New Contributors * @chefarbeiter made their first contribution in dotnet-outdated/dotnet-outdated#671 * @DanielC000 made their first contribution in dotnet-outdated/dotnet-outdated#771 * @timabell made their first contribution in dotnet-outdated/dotnet-outdated#790 * @onuracar-dev made their first contribution in dotnet-outdated/dotnet-outdated#783 * @thomhurst made their first contribution in dotnet-outdated/dotnet-outdated#793 * @GREsau made their first contribution in dotnet-outdated/dotnet-outdated#702 **Full Changelog**: dotnet-outdated/dotnet-outdated@v4.8.1...v4.9.0 Commits viewable in [compare view](dotnet-outdated/dotnet-outdated@v4.8.1...v4.9.0). </details> Updated [ptr727.Utilities](https://github.com/ptr727/Utilities) from 4.1.105 to 4.1.109. <details> <summary>Release notes</summary> _Sourced from [ptr727.Utilities's releases](https://github.com/ptr727/Utilities/releases)._ ## 4.1.109 ## What's Changed * Bump the actions-deps group with 4 updates by @dependabot[bot] in ptr727/Utilities#574 * Bump the nuget-deps group with 2 updates by @dependabot[bot] in ptr727/Utilities#576 * Resync the Instruction Set With the Hub by @ptr727 in ptr727/Utilities#581 * Resync the Skills Tree and Markdownlint Config With the Hub by @ptr727 in ptr727/Utilities#578 * Bring the Publisher Concurrency and Aggregator Name to the Workflow Contract by @ptr727 in ptr727/Utilities#579 * Reconcile the Intent-Fidelity Carried Files With the Hub by @ptr727 in ptr727/Utilities#580 * Promote the Hub Resync to Main by @ptr727 in ptr727/Utilities#582 **Full Changelog**: ptr727/Utilities@4.1.108...4.1.109 ## 4.1.108 ## What's Changed * Bump the actions-deps group with 4 updates by @dependabot[bot] in ptr727/Utilities#575 * Bump the nuget-deps group with 2 updates by @dependabot[bot] in ptr727/Utilities#577 **Full Changelog**: ptr727/Utilities@4.1.105...4.1.108 Commits viewable in [compare view](ptr727/Utilities@4.1.105...4.1.109). </details> Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. 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Updated [csharpier](https://github.com/belav/csharpier) from 1.3.0 to 1.4.0. <details> <summary>Release notes</summary> _Sourced from [csharpier's releases](https://github.com/belav/csharpier/releases)._ ## 1.4.0 ## Breaking Changes ### Drop support for net8.0 and net9.0 [#1888](belav/csharpier#1888) CSharpier and CSharpier.MsBuild now target `net10.0` and `net11.0`. CSharpier.Core targets `net10.0`, `net11.0` and `netstandard2.0`. ## What's Changed ### Feature: Support for .NET 11 and C# 15 [#1888](belav/csharpier#1888) CSharpier now supports the new syntax in C# 15. ```c# public union Pet(Cat, Dog, Bird); public closed record GateState; HashSet<string> set = [with(StringComparer.OrdinalIgnoreCase), "Hello", "HELLO", "hello"]; outer: for (int row = 0; row < grid.Height; row++) { for (int column = 0; column < grid.Width; column++) { if (grid[row, column].IsBlocked) { continue outer; } if (grid[row, column].IsGoal) { break outer; } } } ``` ### Feature: Avoid chopping single trailing lambda [#1865](belav/csharpier#1865) When the last argument is a lambda with a block body, and the arguments up to and including the `=>` fit on one line, CSharpier now keeps them on the same line as the method name. ```c# // input & expected output logging.AddFile(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "server{0}.log"), o => { o.MaxRollingFiles = 1; }); // 1.3.0 logging.AddFile( Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "server{0}.log"), o => { o.MaxRollingFiles = 1; } ); ``` ... (truncated) ## 1.3.11-beta1 ## 1.3.6 # 1.3.6 ## What's Changed #### Fix bug where 2nd instance of VSCode was not able to format code [#784](belav/csharpier#784) Thanks to @BenasB for reporting the issue Commits viewable in [compare view](belav/csharpier@1.3.0...1.4.0). </details> Updated [dotnet-outdated-tool](https://github.com/dotnet-outdated/dotnet-outdated) from 4.8.1 to 4.9.0. <details> <summary>Release notes</summary> _Sourced from [dotnet-outdated-tool's releases](https://github.com/dotnet-outdated/dotnet-outdated/releases)._ ## 4.9.0 ## What's Changed * Adopt MCP 2026-07-28 spec with legacy version negotiation by @slang25 in dotnet-outdated/dotnet-outdated#772 * Fix concurrent cache corruption during recursive file-based app upgrades by @DamianEdwards in dotnet-outdated/dotnet-outdated#788 * Fix: Parameter --maximum-version ignores exact version references by @chefarbeiter in dotnet-outdated/dotnet-outdated#671 * Show a friendly message instead of crashing when a solution has no projects by @DanielC000 in dotnet-outdated/dotnet-outdated#771 * Surface package-upgrade stdout so failures are diagnosable by @timabell in dotnet-outdated/dotnet-outdated#790 * Fix multiline central package version updates by @onuracar-dev in dotnet-outdated/dotnet-outdated#783 * Support versioned MSBuild project SDKs in project files by @thomhurst in dotnet-outdated/dotnet-outdated#793 * Preserve whitespace in Directory.Packages.props during upgrades by @symbiogenesis in dotnet-outdated/dotnet-outdated#803 * Treat package references injected by custom SDKs as auto-referenced by @thomhurst in dotnet-outdated/dotnet-outdated#795 * Preserve version ranges when upgrading packages by @GREsau in dotnet-outdated/dotnet-outdated#702 * Preserve MSBuild version variables across project and props files by @symbiogenesis in dotnet-outdated/dotnet-outdated#805 * Replace McMaster command-line parsing with System.CommandLine by @slang25 in dotnet-outdated/dotnet-outdated#808 * Bump version to 4.9.0 by @slang25 in dotnet-outdated/dotnet-outdated#806 ## New Contributors * @chefarbeiter made their first contribution in dotnet-outdated/dotnet-outdated#671 * @DanielC000 made their first contribution in dotnet-outdated/dotnet-outdated#771 * @timabell made their first contribution in dotnet-outdated/dotnet-outdated#790 * @onuracar-dev made their first contribution in dotnet-outdated/dotnet-outdated#783 * @thomhurst made their first contribution in dotnet-outdated/dotnet-outdated#793 * @GREsau made their first contribution in dotnet-outdated/dotnet-outdated#702 **Full Changelog**: dotnet-outdated/dotnet-outdated@v4.8.1...v4.9.0 Commits viewable in [compare view](dotnet-outdated/dotnet-outdated@v4.8.1...v4.9.0). </details> Updated [Microsoft.Extensions.Http.Resilience](https://github.com/dotnet/extensions) from 10.11.0 to 11.0.0. <details> <summary>Release notes</summary> _Sourced from [Microsoft.Extensions.Http.Resilience's releases](https://github.com/dotnet/extensions/releases)._ ## 11.0.0 <!-- DRAFT: not published. Public baseline f8ee27151b21e33793164b39de5bcebfdced81a4 (includes #7923). Official build source/tag target c60d72e7973a90cd4e4300d9153e97b93315e4b7 = baseline + 9 internal release-prep commits (infrastructure, .NET 8/9/10/11 dependency updates, test pins, feeds, SDK 11.0.100 pin); no additional PRs. Official build 3132207, BAR 340823, final published manifest SHA256 A694CB054BBD836E73E2EF9EFA26FAD025EC6F709273D4CF217E08F5E1DE5CE6. c60d72e is publicly reachable. --> <!-- AVAILABILITY STATUS (2026-11-10): Public SDK 11.0.100 GA/download and servicing 8.0.34/9.0.23/10.0.15 are confirmed available. Three successful dotnet-public reads at 16:50:57Z, 17:05:36Z, and 17:20:30Z found neither Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.34 nor 9.0.23 listed. The index samples do not establish restore, official CI, or dependency closure. --> <!-- VALIDATION STATUS (NOT PASSED): All 55 published package listings, provenance/content and signatures were verified, as were 900 library/analyzer consumer graphs. The user's BAR readback confirms build 340823 in .NET 11 channel 8297. Published-source commit c60d72e7973a90cd4e4300d9153e97b93315e4b7 is publicly reachable. All 272 selected library PDBs on msdl matched the original identities and bytes. Website follow-up is user-deferred. --> Version 11.0.0 ships alongside .NET 11 and with net11 targets added to packages. Highlights of this release include new experimental Documents and Document Extraction abstractions, metric instrument descriptions, and a sliding-window retry budget for HTTP resilience. ## Experimental API Changes ### Now Stable * HTTP server latency telemetry (`AddHttpServerLatencyTelemetry`) APIs are now stable (previously `EXTEXP0013`) #7898 ### New Experimental APIs * New experimental API: Documents abstractions in the new `Microsoft.Extensions.Documents.Abstractions` package (`EXTEXP0019`) #7835 * New experimental API: Document Extraction in the new `Microsoft.Extensions.DocumentExtraction` and `Microsoft.Extensions.DocumentExtraction.Abstractions` packages (`MEDE0001`) #7588 * New experimental API: HTTP resilience retry budget (`HttpRetryBudgetOptions`, `HttpRetryResiliencePipelineBuilderExtensions`, `OnRetryBudgetExhaustedArguments`) (`EXTEXP0001`) #7867 * New experimental API: `Description` on metric attributes (`EXTEXP0003`) #7837 ### Obsoleted APIs * `HybridCacheOptions.DisableCompression` is now obsolete (`EXTOBS0003`) #7885 ## What's Changed ### Telemetry and Logging * Add Description to metric attributes and describe all instruments #7837 by @evgenyfedorov2 (co-authored by @Copilot) * Capture trace context, thread ID and message template in buffered logs #7818 by @evgenyfedorov2 (co-authored by @Copilot) * Allow bool and numeric types for strongly-typed metric tags #7877 by @evgenyfedorov2 (co-authored by @Copilot) * Fix route parameter redaction when a parameter value contains a delimiter used later in the same path segment #7828 by @evgenyfedorov2 (co-authored by @Copilot) * Fix lost log records when logging reentrantly on the same thread #7847 by @evgenyfedorov2 (co-authored by @Copilot) * Fix logging generator stack overflow on type cycles #7861 by @evgenyfedorov2 (co-authored by @Copilot) * Honor `[LogPropertyIgnore]` during transitive logging and `[LogProperties(Transitive = true)]` on properties #7868 by @evgenyfedorov2 (co-authored by @Copilot) * Make DataClassificationSet static to decrease allocations #7874 by @evgenyfedorov2 (co-authored by @Copilot) ### Caching * Add HybridCache.GetOrCreateAsync overloads for dynamic setting of options #7568 by @svick (co-authored by @Copilot) * Mark HybridCacheOptions.DisableCompression as obsolete #7885 by @slang25 * Fix HybridCache stampede state removal race #7814 by @svick (co-authored by @Copilot) * Fix HybridCache reservation over-release on DisableUnderlyingData miss #7879 by @Eng3bbas ### AI * AI: Restore neutral tool approval rejection message #7913 by @jozkee (co-authored by @Copilot) * Fix ImageGenerationOptions.Clone dropping StreamingCount #7829 by @Empiree * Fix evaluation context serialization without reflection fallback #7869 by @valkiara * Pin MessagePack 2.5.307 in AI template AppHost project #7853 by @evgenyfedorov2 (co-authored by @Copilot) ### Packaging and Target Frameworks * Condition framework-provided package references for .NET 11 #7915 by @jeffhandley (co-authored by @Copilot) ... (truncated) Commits viewable in [compare view](dotnet/extensions@v10.11.0...v11.0.0). </details> Updated [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 18.11.0 to 18.12.0. <details> <summary>Release notes</summary> _Sourced from [Microsoft.NET.Test.Sdk's releases](https://github.com/microsoft/vstest/releases)._ No release notes found for this version range. Commits viewable in [compare view](https://github.com/microsoft/vstest/commits). </details> Updated [System.CommandLine](https://github.com/dotnet/dotnet) from 2.0.14 to 3.0.0. <details> <summary>Release notes</summary> _Sourced from [System.CommandLine's releases](https://github.com/dotnet/dotnet/releases)._ No release notes found for this version range. Commits viewable in [compare view](https://github.com/dotnet/dotnet/commits). </details> Updated [xunit.analyzers](https://github.com/xunit/xunit.analyzers) from 2.2.0 to 2.3.0. <details> <summary>Release notes</summary> _Sourced from [xunit.analyzers's releases](https://github.com/xunit/xunit.analyzers/releases)._ No release notes found for this version range. Commits viewable in [compare view](https://github.com/xunit/xunit.analyzers/commits). </details> Updated [xunit.v3](https://github.com/xunit/xunit) from 4.0.2 to 4.0.3. <details> <summary>Release notes</summary> _Sourced from [xunit.v3's releases](https://github.com/xunit/xunit/releases)._ No release notes found for this version range. Commits viewable in [compare view](https://github.com/xunit/xunit/commits). </details> Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore <dependency name> major version` will close this group update PR and stop Dependabot creating any more for the specific dependency's major version (unless you unignore this specific dependency's major version or upgrade to it yourself) - `@dependabot ignore <dependency name> minor version` will close this group update PR and stop Dependabot creating any more for the specific dependency's minor version (unless you unignore this specific dependency's minor version or upgrade to it yourself) - `@dependabot ignore <dependency name>` will close this group update PR and stop Dependabot creating any more for the specific dependency (unless you unignore this specific dependency or upgrade to it yourself) - `@dependabot unignore <dependency name>` will remove all of the ignore conditions of the specified dependency - `@dependabot unignore <dependency name> <ignore condition>` will remove the ignore condition of the specified dependency and ignore conditions </details> --------- Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Pieter Viljoen <ptr727@users.noreply.github.com> Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
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Fixes #789.
Summary
Fixes a race condition that can crash
dotnet outdated --recursive -fba -uwhen analyzing multiple file-based apps.Project analysis runs in parallel using a shared
VariableTrackingService, but its variable and file-based-app scan caches used non-thread-safe dictionaries. Concurrent writes could corrupt those caches.In the reported failure, upgrading
Aspire.AppHost.Sdkupdated the source file successfully, then cache invalidation encountered a corrupted null key and crashed:Changes
ConcurrentDictionary, preserving case-insensitive keys.TryRemoveduring cache invalidation.This addresses the underlying cache corruption rather than masking the null-key exception.
Validation