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Wasm R2R test failure: GenericVirtualMethod.Program.TestGenericVirtualMethod #134660

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#134676
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Wasm R2R test failure: GenericVirtualMethod.Program.TestGenericVirtualMethod#134660
#134676
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Known Build ErrorUse this to report build issues in the .NET Helix tabarch-wasmWebAssembly architecturearea-VM-coreclrblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

Description

@akoeplinger
akoeplinger
opened on Sep 25, 2026

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1612334
Build error leg or test failing: coreclr Pri0 Runtime Tests Run R2R_CG2 browser wasm checked - async/GenericVirtualMethod.Program.TestGenericVirtualMethod
Pull request: #134643

Error Details

Running test: _covariant_return_covariant_returns::GenericVirtualMethod.Program.TestGenericVirtualMethod()
ASSERT FAILED
    Expression: numGenericArgs > 0
    Location:   /__w/1/s/src/coreclr/vm/prestub.cpp:3482
    Function:   ProcessDynamicDictionaryLookup
Frame (InterpreterFrame):
   0) Derived::IL_STUB_InstantiatingStub
   1) Mid::InstanceMethod
   2) Mid::IL_STUB_InstantiatingStub

Error Message

{
  "ErrorMessage": "Expression: numGenericArgs > 0",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Note

This issue was generated by GitHub Copilot from CI failure evidence.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1612334
Error message validated: [Expression: numGenericArgs > 0]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/25/2026 4:01:02 PM UTC

Report

Build Repository Test Pull Request
1612334 dotnet/runtime async.WorkItemExecution #134643

Summary

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

Activity

  1. akoeplinger
    added
    arch-wasmWebAssembly architecture
    area-VM-coreclr
    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
    runtime-async
    on Sep 25, 2026
  2. github-project-automation
    added this to AppModelon Sep 25, 2026

  3. dotnet-policy-service commented on Sep 25, 2026

    @dotnet-policy-service
    dotnet-policy-servicebot
    on Sep 25, 2026 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
    See info in area-owners.md if you want to be subscribed.

  4. dotnet-policy-service
    added
    untriagedNew issue has not been triaged by the area owner
    on Sep 25, 2026
  5. akoeplinger
    added a commit that references this issue on Sep 25, 2026

    Disable generic virtual async test on Wasm R2R

    513af46

  6. dotnet-policy-service commented on Sep 25, 2026

    @dotnet-policy-service
    dotnet-policy-servicebot
    on Sep 25, 2026 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to this area: @agocke
    See info in area-owners.md if you want to be subscribed.

  7. akoeplinger
    changed the title [-][ci-scan] Test failure: GenericVirtualMethod.Program.TestGenericVirtualMethod[/-] [+]Wasm R2R test failure: GenericVirtualMethod.Program.TestGenericVirtualMethod[/+] on Sep 25, 2026

  8. MihuBot commented on Sep 25, 2026

    @MihuBot
    MihuBot
    on Sep 25, 2026

    I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

  9. akoeplinger
    removed
    runtime-async
    on Sep 25, 2026
  10. lewing
    added a commit that references this issue on Sep 29, 2026

    [wasm][R2R] Fix generic context / async continuation order in Wasm in…

    1245471
  11. lewing
    closed this as completedin #134676on Sep 29, 2026
  12. dotnet-policy-service
    removed
    untriagedNew issue has not been triaged by the area owner
    on Sep 29, 2026
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    Known Build ErrorUse this to report build issues in the .NET Helix tabarch-wasmWebAssembly architecturearea-VM-coreclrblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

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