[2.0 Servicing] Fix UniversalBGTask crash and gracefully handle CoCreateInstance failures - #6568
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Godly T.Alias (godlytalias) merged 5 commits intoJun 30, 2026
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…ures (#6507) UniversalBGTask::Task::Run could crash backgroundTaskHost.exe in two scenarios: 1. When LocalSettings has no entry for the task's TaskId, ApplicationDataContainerSettings::Lookup returns S_OK with a null IInspectable. The subsequent unbox_value<guid> then throws hresult_no_interface, and because the broker treats the failure as transient it re-fires the trigger forever. 2. When CoCreateInstance fails (e.g. the COM class isn't registered against the package), the wrapped THROW_IF_FAILED produced no diagnostic context. Fix: - If LocalSettings.Lookup returns null, log via wil and unregister the orphaned OS task so the broker stops re-firing it. - If CoCreateInstance fails, log the HR with the CLSID and TaskId and return cleanly. The registration is left in place so the broker can retry on the next trigger in case the failure is transient. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
…fix (bug 62755661) Wrap the crash-hardening behavior behind WINAPPSDK_CHANGEID_62755661 (WinAppSDK_2_2_2) and add the RuntimeCompatibilityChange.UniversalBGTask_RunCrash enum entry so apps can opt out via RuntimeCompatibilityOptions.
Godly T.Alias (godlytalias)
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June 18, 2026 08:05
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…bgtask-crash-on-release-2.0-stable
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agniuks
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Jun 18, 2026
Co-authored-by: agniuks <41223743+agniuks@users.noreply.github.com>
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…rsalBGTaskDLL Task.cpp now includes <FrameworkUdk/Containment.h> for the containment fix, but WindowsAppRuntime_UniversalBGTaskDLL.vcxproj did not import the Microsoft.FrameworkUdk targets, so the FrameworkUdk include directory was missing from the compiler command line, causing: Task.cpp(10,10): error C1083: Cannot open include file: 'FrameworkUdk/Containment.h': No such file or directory Import Microsoft.FrameworkUdk.targets (which adds the include path and the Microsoft.Internal.FrameworkUdk.lib link dependency) plus the matching package-restore Error check, mirroring the existing pattern used by Microsoft.Windows.ApplicationModel.Resources.vcxproj and other Containment consumers. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Hemant Kumar (Hemantxk)
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Jun 30, 2026
Godly T.Alias (godlytalias)
merged commit Jun 30, 2026
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Godly T.Alias (godlytalias)
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June 30, 2026 18:00
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UniversalBGTask::Task::Run could crash backgroundTaskHost.exe in two scenarios:
When LocalSettings has no entry for the task's TaskId, ApplicationDataContainerSettings::Lookup returns S_OK with a null IInspectable. The subsequent unbox_valuewinrt::guid then throws hresult_no_interface, and because the broker treats the failure as transient it re-fires the trigger forever.
When CoCreateInstance fails (e.g. the COM class isn't registered against the package), the wrapped THROW_IF_FAILED produced no diagnostic context.
Fix
Servicing
WINAPPSDK_CHANGEID_62755661(WinAppSDK_2_2_2); the original (throwing) behavior is preserved in theelsebranch for apps pinned to an earlier patch level.UniversalBGTask_RunCrash = 62755661.Cherry picked from #6507