[Known Build Error] Test_Windows_Desktop_Release_32: Test host process crashed

[RikkiGibson]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1520534&view=logs&j=4f4b926f-8abe-5536-d4a9-2361289b3c74
Build error leg or test failing: Windows_Release_Desktop / Test_Windows_Desktop_Release_32 / Run Unit Tests
Pull request: #84575

Error Message

{
  "ErrorMessage": "The active test run was aborted. Reason: Test host process crashed",
  "ErrorPattern": "",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

Additional details

Recurring testhost.net472.x86 crash on the Test_Windows_Desktop_Release_32 leg (windows.amd64.vs2026.pre.scout.open Helix queue), not correlated with PR content — same signature (different failing test assembly each time) observed across multiple unrelated main builds in the same window:

• Build 1520534 (PR File-based apps: avoid running a few irrelevant editor features #84575) — crash after Microsoft.VisualStudio.LanguageServices.LiveShare.UnitTests.ProjectsHandlerTests
• Build 1520424 (main) — crash after Microsoft.CodeAnalysis.LanguageServer.Protocol.UnitTests started
• Build 1520169 (main) — same Release_32 job failure

No crash dump is captured (Data collector 'Blame' message: procdump.exe could not be found, please make sure that the executable is available on PATH), so the underlying exception type can't be confirmed from the console log alone, but the pattern matches prior closed issues about 32-bit OOM crashes on this same leg: #82135, #83640.

Likely related root causes to investigate:

• x86 (32-bit) testhost memory pressure on windows.amd64.vs2026.pre.scout.open — consider further partitioning Release_32.
• procdump.exe missing from PATH on this queue image, preventing crash dump collection for diagnosis.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1520534
Error message validated: [The active test run was aborted. Reason: Test host process crashed]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/22/2026 1:09:48 AM UTC

Report

Build	Repository	Step Name	Console log	Pull Request
1542534	dotnet/roslyn	Test	Log	#83235
1541417	dotnet/roslyn	Test	Log
1540813	dotnet/roslyn	Test	Log
1540471	dotnet/roslyn	Test	Log	#84765
1539629	dotnet/roslyn	Test	Log	#83593
1538201	dotnet/roslyn	Test	Log	#84728
1538007	dotnet/roslyn	Test	Log	#84741
1535665	dotnet/roslyn	Test	Log
1535483	dotnet/roslyn	Test	Log
1531347	dotnet/roslyn	Test	Log	#84602
1531331	dotnet/roslyn	Test	Log	#84664
1530290	dotnet/roslyn	Test	Log
1527469	dotnet/roslyn	Test	Log	#84485
1524499	dotnet/roslyn	Test	Log	#84605
1521942	dotnet/roslyn	Run Integration Tests	Log	#84536
1520925	dotnet/roslyn	Test	Log	#84583

Build	Repository	Test	Pull Request
1543860	dotnet/roslyn	workitem_42.WorkItemExecution
1543675	dotnet/roslyn	workitem_6.WorkItemExecution
1543297	dotnet/roslyn	workitem_40.WorkItemExecution
1542385	dotnet/roslyn	workitem_40.WorkItemExecution
1542098	dotnet/roslyn	workitem_2.WorkItemExecution
1541916	dotnet/roslyn	workitem_6.WorkItemExecution
1541458	dotnet/roslyn	workitem_7.WorkItemExecution	#84740
1541375	dotnet/roslyn	workitem_6.WorkItemExecution
1540382	dotnet/roslyn	workitem_9.WorkItemExecution	#84762
1540289	dotnet/roslyn	workitem_10.WorkItemExecution	#84738
1540238	dotnet/roslyn	workitem_40.WorkItemExecution
1540225	dotnet/roslyn	workitem_6.WorkItemExecution
1540202	dotnet/roslyn	workitem_7.WorkItemExecution	#84759
1539264	dotnet/roslyn	workitem_2.WorkItemExecution	#84738
1538868	dotnet/roslyn	workitem_10.WorkItemExecution	#84751
1538615	dotnet/roslyn	workitem_41.WorkItemExecution
1538565	dotnet/roslyn	workitem_23.WorkItemExecution
1538370	dotnet/roslyn	workitem_6.WorkItemExecution
1538367	dotnet/roslyn	workitem_41.WorkItemExecution	#84743
1536874	dotnet/roslyn	workitem_7.WorkItemExecution
1535535	dotnet/roslyn	workitem_40.WorkItemExecution
1535478	dotnet/roslyn	workitem_29.WorkItemExecution
1534803	dotnet/roslyn	workitem_10.WorkItemExecution
1534663	dotnet/roslyn	workitem_10.WorkItemExecution
1534193	dotnet/roslyn	workitem_10.WorkItemExecution	#84536
1534013	dotnet/roslyn	workitem_12.WorkItemExecution
1532640	dotnet/roslyn	workitem_12.WorkItemExecution
1531931	dotnet/roslyn	workitem_40.WorkItemExecution
1531764	dotnet/roslyn	workitem_10.WorkItemExecution
1531556	dotnet/roslyn	workitem_10.WorkItemExecution	#84500
1530913	dotnet/roslyn	workitem_41.WorkItemExecution
1530918	dotnet/roslyn	workitem_40.WorkItemExecution	#84670
1530852	dotnet/roslyn	workitem_7.WorkItemExecution	#84582
1530802	dotnet/roslyn	workitem_6.WorkItemExecution	#84670
1530653	dotnet/roslyn	workitem_39.WorkItemExecution
1529284	dotnet/roslyn	workitem_6.WorkItemExecution	#84655
1528809	dotnet/roslyn	workitem_6.WorkItemExecution
1528736	dotnet/roslyn	workitem_6.WorkItemExecution	#84485
1527604	dotnet/roslyn	Microsoft.CodeAnalysis.VisualBasic.ExpressionEvaluator.ExpressionCompiler.UnitTests_Microsoft.CodeAnalysis.VisualBasic.Features.UnitTests_230.WorkItemExecution	#84059
1527258	dotnet/roslyn	workitem_9.WorkItemExecution	#84485
1525696	dotnet/roslyn	workitem_40.WorkItemExecution
1524586	dotnet/roslyn	workitem_6.WorkItemExecution
1524403	dotnet/roslyn	workitem_40.WorkItemExecution	#84605
1524261	dotnet/roslyn	workitem_40.WorkItemExecution	#84605
1524127	dotnet/roslyn	workitem_40.WorkItemExecution
1522849	dotnet/roslyn	workitem_28.WorkItemExecution
1522832	dotnet/roslyn	workitem_7.WorkItemExecution
1522552	dotnet/roslyn	workitem_41.WorkItemExecution
1521941	dotnet/roslyn	workitem_9.WorkItemExecution	#84536
1520999	dotnet/roslyn	workitem_38.WorkItemExecution	#84577
1520892	dotnet/roslyn	workitem_6.WorkItemExecution	#84541
1520815	dotnet/roslyn	workitem_16.WorkItemExecution
1520799	dotnet/roslyn	workitem_39.WorkItemExecution
1520613	dotnet/roslyn	workitem_42.WorkItemExecution
1520611	dotnet/roslyn	workitem_2.WorkItemExecution
1520562	dotnet/roslyn	workitem_39.WorkItemExecution	#83593
1520534	dotnet/roslyn	workitem_39.WorkItemExecution	#84575

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
3	31	73