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[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR #130479

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[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR#130479
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lewingpavelsavararadekdoulik
Labels
Known Build ErrorUse this to report build issues in the .NET Helix tabarch-wasmWebAssembly architecturearea-System.Globalizationblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'
Milestone
12.0.0

Description

@kotlarmilos
kotlarmilos
opened on Jul 10, 2026

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1502921
Build error leg or test failing: browser-wasm linux Release LibraryTestsCoreCLR - WasmTestOnChrome-CLR-ST-Batch-4 - System.Globalization.Extensions.Tests
Pull request: #130168

Error Details

On the browser-wasm CoreCLR library test leg (WasmTestOnChrome-CLR-ST), the whole System.Globalization.Extensions.Tests work item fails because libSystem.Globalization.Native cannot be loaded. The build has dynamic linking disabled, so every Interop.Globalization.* P/Invoke throws System.DllNotFoundException. All 156 failing cases are System.Globalization.Tests.IdnMappingGetUnicodeTests (plus IdnMappingIdnaConformanceTests) and share the same stack through Interop.Globalization.ToUnicode.

[FAIL] System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode_EmptyBuffer
System.DllNotFoundException : Unable to load shared library 'libSystem.Globalization.Native' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable:
dynamic linking not enabled

   at Interop.Globalization.ToUnicode(UInt32 flags, ReadOnlySpan`1 src, Int32 srcLen, Span`1 dstBuffer, Int32 dstBufferCapacity)
   at System.Globalization.IdnMapping.IcuTryGetUnicodeCore(ReadOnlySpan`1 ascii, Span`1 destination, Int32& charsWritten)
   at System.Globalization.IdnMapping.TryGetUnicode(ReadOnlySpan`1 ascii, Span`1 destination, Int32& charsWritten)
   at System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode_EmptyBuffer()

Error Message

{
  "ErrorMessage": [
    "Unable to load shared library 'libSystem.Globalization.Native'",
    "dynamic linking not enabled"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": true
}

Failure details:

  • System.DllNotFoundException : Unable to load shared library 'libSystem.Globalization.Native' followed by dynamic linking not enabled.
  • 156 failing cases, all in System.Globalization.Tests.IdnMappingGetUnicodeTests and System.Globalization.Tests.IdnMappingIdnaConformanceTests.
  • Signature verified with grep -Fc against the work item wasm-console.log: 1133 hits for each element, 0 hits on [PASS]/[SKIP] lines.

Affected legs:

  • runtime / browser-wasm linux Release LibraryTestsCoreCLR, work item WasmTestOnChrome-CLR-ST-Batch-4.
  • Queue (Ubuntu.2604.Amd64.Open) with the ubuntu-26.04-helix-webassembly-amd64 image.

Console Log:

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1502921
Error message validated: [Unable to load shared library 'libSystem.Globalization.Native' dynamic linking not enabled]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/10/2026 11:41:39 AM UTC

Report

Build Repository Test Pull Request
1503199 dotnet/runtime System.Globalization.Tests.IdnMappingIdnaConformanceTests.GetUnicode_Success #130483

Summary

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

Activity

  1. kotlarmilos
    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 Jul 10, 2026
  2. dotnet-policy-service
    added
    untriagedNew issue has not been triaged by the area owner
    on Jul 10, 2026
  3. github-actions
    added
    area-System.Globalization
    on Jul 10, 2026
  4. kotlarmilos
    added this to the 11.0.0 milestone on Jul 10, 2026

  5. dotnet-policy-service commented on Jul 10, 2026

    @dotnet-policy-service
    dotnet-policy-servicebot
    on Jul 10, 2026 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to this area: @dotnet/area-system-globalization
    See info in area-owners.md if you want to be subscribed.

  6. dotnet-policy-service
    removed
    untriagedNew issue has not been triaged by the area owner
    on Jul 10, 2026

  7. MihuBot commented on Jul 10, 2026

    @MihuBot
    MihuBot
    on Jul 10, 2026

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

  8. pavelsavara
    added
    arch-wasmWebAssembly architecture
    on Jul 10, 2026

  9. dotnet-policy-service commented on Jul 10, 2026

    @dotnet-policy-service
    dotnet-policy-servicebot
    on Jul 10, 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.

  10. github-actions commented on Jul 10, 2026

    @github-actions
    github-actionsbot
    on Jul 10, 2026 – with GitHub Actions
    Contributor

    Caution

    agentic threat detected
    Threat detection flagged this output in warn mode. Manual review is REQUIRED before any follow-up automation.

    Details

    The threat detection results could not be parsed.

    Review the workflow run logs for details.

    Workflow artifact: ci-fix
    Artifact kind: handoff
    Linked KBE: #130479

    Note

    AI/Copilot-generated root-cause hand-off (ci-failure-fix). No automated code change was produced: the failure is a browser-wasm CoreCLR build/link configuration gap, and the only in-bounds test-side option would be to exclude/skip the globalization tests on that leg (muting), which this workflow must not do. Looping in owners to fix forward.

    Root cause (read-only analysis)

    On the new browser-wasm CoreCLR library-test leg, System.Globalization tests fail because the ICU shim native library cannot be loaded:

    System.DllNotFoundException: Unable to load shared library 'libSystem.Globalization.Native' ...

    Every Interop.Globalization.* P/Invoke throws DllNotFoundException because dynamic native linking is not enabled in the CoreCLR-on-WASM single-threaded test host, so libSystem.Globalization.Native is never resolvable at runtime. This is not a test defect and not a globalization-library bug — the managed interop is correct; the failure is that the browser-wasm CoreCLR test configuration does not make the globalization native shim available (it is neither statically linked into the runtime nor dlopen-able because dynamic linking is disabled on that leg).

    Both conceivable changes are out of scope for this workflow:

    • Excluding or skipping the globalization tests on the browser-wasm CoreCLR leg would mute them — not allowed here.
    • Statically linking (or otherwise enabling loading of) System.Globalization.Native into the browser-wasm CoreCLR test host is a runtime/build configuration change well outside small-fix bounds, and cannot be built/validated in this environment.

    Whether this leg should statically link the globalization shim, enable dynamic linking, or run with invariant globalization is a maintainer judgement, so I am handing off rather than editing build config blindly.

    Evidence

    Suggested reviewers / area contacts

    • arch-wasm (browser-wasm CoreCLR build/link config): @lewing
    • Area owners (area-System.Globalization): @dotnet/area-system-globalization

    Please verify before acting; the native-link decision for the browser-wasm CoreCLR test host is the key call here.

    Generated by CI Outer-Loop Failure Fixer · 301.9 AIC · ⊞ 18K · ◷

  11. jkotas
    marked [wasm] Unable to load shared library 'libSystem.Globalization.Native' or one of its dependencie #130486 as a duplicate of this issue on Jul 10, 2026
  12. pavelsavara
    assigned
    pavelsavara
    and
    radekdoulik
    on Jul 10, 2026
  13. lewing
    added a commit that references this issue on Jul 11, 2026

    [wasm] Fix CoreCLR P/Invoke EntryCount for libSystem.Globalization.Na…

    7db4382
  14. eiriktsarpalis
    added a commit that references this issue on Jul 15, 2026

    [wasm] Fix CoreCLR P/Invoke EntryCount for libSystem.Globalization.Na…

    0a937ea

  15. pavelsavara commented on Jul 15, 2026

    @pavelsavara
    pavelsavara
    on Jul 15, 2026
    Member

    This should be fixed by #130543

  16. pavelsavara
    assigned
    lewing
    on Jul 15, 2026
  17. pavelsavara
    modified the milestones: 11.0.0, 12.0.0 on Jul 16, 2026
  18. kotlarmilos
    closed this as completedon Aug 14, 2026
  19. github-actions
    locked and limited conversation to collaborators on Sep 14, 2026
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