iOS tests failing with OSError: [Errno 28] No space left on device

[MihaZupan]

Build

https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1337140

E.g. https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-125526-merge-c11096c024db465987/iOS.Device.ParallelForEachAsync.Test.Attempt.3/f3035da5-b542-43ef-9283-a42707d78008.log

Build leg reported

iOS.Device.Aot.Test.WorkItemExecution

Pull Request

dotnet/runtime#125526

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" : "OSError: [Errno 28] No space left on device",
    "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=1337140
Error message validated: [OSError: [Errno 28] No space left on device]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 3/16/2026 4:54:41 PM UTC

Report

Build	Repository	Test	Pull Request
1447485	dotnet/runtime	System.Data.Common.Tests.WorkItemExecution
1443952	dotnet/runtime	Microsoft.Extensions.FileProviders.Physical.Tests.WorkItemExecution
1442805	dotnet/runtime	System.Diagnostics.Debug.Tests.WorkItemExecution
1441664	dotnet/runtime	WBT-Workloads-MONO-ST-Wasm.Build.Tests.WasmRunOutOfAppBundleTests.WorkItemExecution	dotnet/runtime#128606
1442083	dotnet/runtime	WBT-Workloads-MONO-ST-Wasm.Build.Tests.ConfigSrcTests.WorkItemExecution	dotnet/runtime#127461
1442058	dotnet/runtime	WBT-Workloads-MONO-ST-Wasm.Build.Tests.WorkloadTests.WorkItemExecution	dotnet/runtime#128799
1441846	dotnet/runtime	System.Memory.Data.Tests.WorkItemExecution
1440990	dotnet/runtime	System.ValueTuple.Tests.WorkItemExecution	dotnet/runtime#128408
1441419	dotnet/runtime	WBT-NoWebcil-MONO-ST-Wasm.Build.Tests.Blazor.AppsettingsTests.WorkItemExecution	dotnet/runtime#128365
1441364	dotnet/runtime	WBT-NoWebcil-MONO-ST-Wasm.Build.Tests.InvariantTimezoneTests.WorkItemExecution	dotnet/runtime#128776
1439314	dotnet/runtime	System.Text.Json.Tests.WorkItemExecution	dotnet/runtime#128705
1438268	dotnet/runtime	System.Numerics.Vectors.Tests.WorkItemExecution
1436493	dotnet/runtime	System.Reflection.MetadataLoadContext.Tests.WorkItemExecution
1428400	dotnet/runtime	System.Data.Common.Tests.WorkItemExecution
1427236	dotnet/runtime	System.Diagnostics.FileVersionInfo.Tests.WorkItemExecution
1424920	dotnet/runtime	System.Text.RegularExpressions.Unit.Tests.WorkItemExecution	dotnet/runtime#128068
1423593	dotnet/runtime	Microsoft.Extensions.Diagnostics.Abstractions.Tests.WorkItemExecution
1423053	dotnet/runtime	System.ObjectModel.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	8	18