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SOS.Tests.DiagnosticCommandTests.DumpGcData tests failures #136190

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dotnet/diagnostics
#6128
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SOS.Tests.DiagnosticCommandTests.DumpGcData tests failures#136190
dotnet/diagnostics
#6128
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max-charlamb
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Known Build ErrorUse this to report build issues in the .NET Helix tabarea-Diagnostics-cdacblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

Description

@sbomer
sbomer
opened on Oct 20, 2026
failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/DotnetDump/Core/net11/Dump/Workstation/Heap/cdac) (1s 168ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_DotnetDump_Core_net11_Dump_Workstation_Heap_cdac__830B7621D0A3.replay.txt
    
  Error output
[+400/x1/?2] SOS.Tests.dll (net10.0|arm64) - SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Live/Workstation) (4m 21s)

failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Live/Workstation) (3s 350ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_Lldb_Core_net11_Live_Workstation__7D3C31ECDF96.replay.txt
    
  Error output
[+400/x2/?2] SOS.Tests.dll (net10.0|arm64) - SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Server/Heap) (4m 24s)

failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Server/Heap) (2s 648ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0, 0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_Lldb_Core_net11_Dump_Server_Heap__6512C2D3ADE0.replay.txt
    
  Error output
failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/DotnetDump/Core/net11/Dump/Server/Heap) (595ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0, 0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_DotnetDump_Core_net11_Dump_Server_Heap__BDBFBE68EEFB.replay.txt
    
  Error output
[+400/x4/?2] SOS.Tests.dll (net10.0|arm64) - SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Server/Heap/cdac) (4m 27s)

failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Server/Heap/cdac) (2s 151ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0, 0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_Lldb_Core_net11_Dump_Server_Heap_cdac__BA258E9E6F0B.replay.txt
    
  Error output
failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/DotnetDump/Core/net11/Dump/Server/Heap/cdac) (586ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0, 0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_DotnetDump_Core_net11_Dump_Server_Heap_cdac__EE3FA596EF78.replay.txt
    
  Error output
[+400/x6/?2] SOS.Tests.dll (net10.0|arm64) - SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Live/Workstation/cdac) (4m 30s)

failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Live/Workstation/cdac) (3s 379ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_Lldb_Core_net11_Live_Workstation_cdac__63233ADDDCC3.replay.txt
    
  Error output
[+400/x7/?2] SOS.Tests.dll (net10.0|arm64) - SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Workstation/Heap/cdac) (4m 33s)

failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Workstation/Heap/cdac) (2s 163ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_Lldb_Core_net11_Dump_Workstation_Heap_cdac__191B3B47C052.replay.txt
    
  Error output
failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/DotnetDump/Core/net11/Dump/Workstation/Heap) (573ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_DotnetDump_Core_net11_Dump_Workstation_Heap__68099FAAF5FF.replay.txt
    
  Error output
[+400/x9/?2] SOS.Tests.dll (net10.0|arm64) - SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Workstation/Heap) (4m 36s)

failed SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(config: dumpgcdata/Lldb/Core/net11/Dump/Workstation/Heap) (2s 046ms)
  Assert.Contains() Failure: Item not found in collection
  Collection: [0]
  Not found:  1
    at SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection(TestConfig config) in /__w/1/s/src/tests/SOS.Tests/DiagnosticCommandTests.cs:54
    --- End of stack trace from previous location ---
  Standard output
    SOS replay written to: /datadisks/disk1/work/ADCF0935/w/9E140918/uploads/SOS-replays/20261020_190534_7532/SOS_Tests_DiagnosticCommandTests_DumpGcData_ReportsPinningAfterCollection_config__dumpgcdata_Lldb_Core_net11_Dump_Workstation_Heap__297F885A9388.replay.txt
    
  Error output

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1642484
Build error leg or test failing: SOS_linux-arm64_Release-Net11.WorkItemExecution
Pull request: #135067

Error Message

DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "SOS.Tests.DiagnosticCommandTests.DumpGcData",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1642484
Error message validated: [SOS.Tests.DiagnosticCommandTests.DumpGcData]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/20/2026 11:26:36 PM UTC

Report

Build Repository Test Pull Request
1645759 dotnet/runtime SOS_win-arm64_Release-Net11.WorkItemExecution #133659
1645572 dotnet/runtime SOS_win-arm64_Release-Net11.WorkItemExecution #132584
1645496 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136290
1645384 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136239
1645228 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #125436
1645234 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #135959
1645221 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136206
1644923 dotnet/runtime SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection #136271
1644817 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution
1644807 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136206
1644585 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #134494
1644545 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135821
1644480 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #132584
1644444 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135805
1644398 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136189
1644366 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135886
1644340 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136113
1644249 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136238
1644255 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #134494
1644048 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135807
1643932 dotnet/runtime SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection #134494
1643875 dotnet/runtime SOS_win-arm64_Release-Net11.WorkItemExecution #135959
1643869 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #125436
1643701 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135959
1643364 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #136206
1643210 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136202
1643230 dotnet/runtime SOS_win-x86_Release-Net11.WorkItemExecution #135807
1643168 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #136113
1643126 dotnet/runtime SOS_win-arm64_Release-Net11.WorkItemExecution #136113
1642917 dotnet/runtime SOS_linux-x64_Release-Net11.WorkItemExecution #136189
1643065 dotnet/runtime SOS_linux-x64_Release-Net11.WorkItemExecution
1643019 dotnet/runtime SOS_linux-x64_Release-Net11.WorkItemExecution #135296
1643001 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #132425
1642837 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #134908
1642807 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #130935
1642793 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135805
1642743 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #134494
1642508 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #136113
1642638 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #132425
1642564 dotnet/runtime SOS_osx-arm64_Release-Net11.WorkItemExecution #135296
1642484 dotnet/runtime SOS_osx-x64_Release-Net11.WorkItemExecution #135067

Summary

24-Hour Hit Count 7-Day Hit Count 1-Month Count
19 41 41

Activity

  1. sbomer
    added
    blocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'
    Known Build ErrorUse this to report build issues in the .NET Helix tab
    on Oct 20, 2026
  2. dotnet-policy-service
    added
    untriagedNew issue has not been triaged by the area owner
    on Oct 20, 2026
  3. github-actions
    added
    area-Diagnostics-coreclr
    on Oct 20, 2026

  4. dotnet-policy-service commented on Oct 20, 2026

    @dotnet-policy-service
    dotnet-policy-serviceBot
    on Oct 20, 2026 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to this area: @steveisok, @tommcdon, @dotnet/dotnet-diag
    See info in area-owners.md if you want to be subscribed.

  5. max-charlamb
    added
    area-Diagnostics-cdac
    and removed
    area-Diagnostics-coreclr
    on Oct 22, 2026
  6. max-charlamb
    self-assigned this
    on Oct 22, 2026

  7. dotnet-policy-service commented on Oct 22, 2026

    @dotnet-policy-service
    dotnet-policy-serviceBot
    on Oct 22, 2026 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to this area: @steveisok, @tommcdon, @dotnet/dotnet-diag
    See info in area-owners.md if you want to be subscribed.

  8. max-charlamb
    removed
    untriagedNew issue has not been triaged by the area owner
    on Oct 22, 2026
  9. max-charlamb
    closed this as completedin diagnostics#6128on Oct 22, 2026
  10. max-charlamb
    added a commit that references this issue on Oct 23, 2026

    Fix dumpgcdata test's pinned-object assumption (dotnet#6128)

    551036f
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Known Build ErrorUse this to report build issues in the .NET Helix tabarea-Diagnostics-cdacblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

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