System.InvalidOperationException: Failed to copy test results from simulator to host. #6442
Description
Build
Seems this is failing a test, crash and can t report back
[06:39:41] dbug: Process bash exited with 1
[06:39:41] dbug: Failed to copy results file from simulator. Expected at: /tmp/helix/working/AADF09C7/w/B9890A37/uploads/test-ios-simulator-64-20251217_053944.log
[06:39:41] fail: Application run failed:
System.InvalidOperationException: Failed to copy test results from simulator to host.
at Microsoft.DotNet.XHarness.Apple.AppTester.RunSimulatorTests(AppBundleInformation appInformation, MlaunchArguments mlaunchArguments, ICrashSnapshotReporter crashReporter, ITestReporter testReporter, IResultFileHandler resultFileHandler, ISimpleListener deviceListener, ISimulatorDevice simulator, ISimulatorDevice companionSimulator, TimeSpan timeout, CancellationToken cancellationToken, RunMode runMode) in /_/src/Microsoft.DotNet.XHarness.Apple/AppOperations/AppTester.cs:line 352
at Microsoft.DotNet.XHarness.Apple.AppTester.TestApp(AppBundleInformation appInformation, TestTargetOs target, IDevice device, IDevice companionDevice, TimeSpan timeout, TimeSpan testLaunchTimeout, Boolean signalAppEnd, IEnumerable`1 extraAppArguments, IEnumerable`1 extraEnvVariables, XmlResultJargon xmlResultJargon, String[] skippedMethods, String[] skippedTestClasses, CancellationToken cancellationToken) in /_/src/Microsoft.DotNet.XHarness.Apple/AppOperations/AppTester.cs:line 257
at Microsoft.DotNet.XHarness.Apple.TestOrchestrator.ExecuteApp(AppBundleInformation appBundleInfo, TestTargetOs target, IDevice device, IDevice companionDevice, TimeSpan timeout, TimeSpan launchTimeout, CommunicationChannel communicationChannel, XmlResultJargon xmlResultJargon, IEnumerable`1 singleMethodFilters, IEnumerable`1 classMethodFilters, IReadOnlyCollection`1 environmentalVariables, IEnumerable`1 passthroughArguments, Boolean signalAppEnd, CancellationToken cancellationToken) in /_/src/Microsoft.DotNet.XHarness.Apple/Orchestration/TestOrchestrator.cs:line 237
at Microsoft.DotNet.XHarness.Apple.BaseOrchestrator.OrchestrateOperationInternal(TestTargetOs target, String deviceName, Boolean includeWirelessDevices, Boolean resetSimulator, Boolean enableLldb, GetAppBundleInfoFunc getAppBundle, ExecuteMacCatalystAppFunc executeMacCatalystApp, ExecuteAppFunc executeApp, CancellationToken cancellationToken) in /_/src/Microsoft.DotNet.XHarness.Apple/Orchestration/BaseOrchestrator.cs:line 309
Build leg reported
Microsoft.Maui.Controls.DeviceTests.WorkItemExecution
Pull Request
N/A
Known issue core information
Fill out the known issue JSON section by following the step by step documentation on how to create a known issue
{
"ErrorMessage" : " System.InvalidOperationException: Failed to copy test results from simulator to host.",
"BuildRetry": false,
"ErrorPattern": "",
"ExcludeConsoleLog": false
}@dotnet/dnceng
Release Note Category
- Feature changes/additions
- Bug fixes
- Internal Infrastructure Improvements
Release Note Description
Additional information about the issue reported
No response
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1234014
Error message validated: [ System.InvalidOperationException: Failed to copy test results from simulator to host.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 12/17/2025 2:25:13 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 5 | 83 | 86 |