[CI Failure] Flaky: ProcessExecutionTests.WaitForExitAsync_WithGracefulServices_SignalerThrows_StillEscalatesToKill fails with 'Assert.Single() Failure: The collection was empty' on Windows

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Build Information

Build: https://github.com/microsoft/aspire/actions/runs/33494022725
Build error leg or test failing: Tests / Cli / Cli (windows-latest) / Aspire.Cli.Tests.DotNet.ProcessExecutionTests.WaitForExitAsync_WithGracefulServices_SignalerThrows_StillEscalatesToKill
Pull request: #19826

Error Message

Assert.Single() Failure: The collection was empty
   at Aspire.Cli.Tests.DotNet.ProcessExecutionTests.WaitForExitAsync_WithGracefulServices_SignalerThrows_StillEscalatesToKill(Boolean isolateConsole) in D:\a\aspire\aspire\tests\Aspire.Cli.Tests\DotNet\ProcessExecutionTests.cs:line 265

Description

Flaky: ProcessExecutionTests.WaitForExitAsync_WithGracefulServices_SignalerThrows_StillEscalatesToKill fails with 'Assert.Single() Failure: The collection was empty' on Windows

Type: flaky-test

Occurrences

Date	Build	Job	PR
2026-09-01	33494022725	Tests / Cli / Cli (windows-latest)	#19826
2026-09-03	33782779276	Tests / No-package tests (regular, Aspire.Hosting.CodeGeneration.TypeScript.Tests, Hosting.CodeGeneration... / Hosting.CodeGeneration.TypeScript (windows-latest)	#19465