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The checked-in CoreCLR WebAssembly call helpers in src/coreclr/vm/wasm/wasi/ are out of date. #136543

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The checked-in CoreCLR WebAssembly call helpers in src/coreclr/vm/wasm/wasi/ are out of date.#136543
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Known Build ErrorUse this to report build issues in the .NET Helix tabarea-VM-coreclrblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

Description

@MihaZupan
MihaZupan
opened on Oct 27, 2026

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1651055&view=logs&j=149f271a-62bf-57d4-9e9a-9c7efca8df5b
Build error leg or test failing: Build / wasi-wasm linux Release CoreCLR_BuildOnly / Check wasi CoreCLR call helpers are up to date
Pull request: #136519

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  "ErrorMessage": "The checked-in CoreCLR WebAssembly call helpers in src/coreclr/vm/wasm/wasi/ are out of date.",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1651055
Error message validated: [The checked-in CoreCLR WebAssembly call helpers in src/coreclr/vm/wasm/wasi/ are out of date.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/27/2026 9:19:40 PM UTC

Activity

  1. MihaZupan
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    Known Build ErrorUse this to report build issues in the .NET Helix tab
    on Oct 27, 2026
  2. dotnet-policy-service
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    on Oct 27, 2026
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    area-Infrastructure-coreclrOnly use for closed issues
    on Oct 27, 2026
  4. github-project-automation
    added this to Runtime Infraon Oct 27, 2026
  5. MihaZupan
    added
    area-VM-coreclr
    and removed
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    on Oct 27, 2026
  6. github-project-automation
    added this to AppModelon Oct 27, 2026

  7. MihaZupan commented on Oct 27, 2026

    @MihaZupan
    MihaZupan
    on Oct 27, 2026
    MemberAuthor
    ##[error]The checked-in CoreCLR WebAssembly call helpers in src/coreclr/vm/wasm/wasi/ are out of date. Regenerate them and commit the result; see the step log for the diff and the commands.
 M src/coreclr/vm/wasm/wasi/callhelpers-pinvoke.cpp
diff --git a/src/coreclr/vm/wasm/wasi/callhelpers-pinvoke.cpp b/src/coreclr/vm/wasm/wasi/callhelpers-pinvoke.cpp
index 47edb935..01ad7600 100644
--- a/src/coreclr/vm/wasm/wasi/callhelpers-pinvoke.cpp
+++ b/src/coreclr/vm/wasm/wasi/callhelpers-pinvoke.cpp
@@ -16,6 +16,7 @@ extern "C" {
     int32_t BrotliDecoderDecompressStream (void *, void *, void *, void *, void *, void *);
     void BrotliDecoderDestroyInstance (void *);
     int32_t BrotliDecoderIsFinished (void *);
+    int32_t BrotliDecoderSetParameter (void *, int32_t, uint32_t);
     int32_t BrotliEncoderCompress (int32_t, int32_t, int32_t, void *, void *, void *, void *);
     int32_t BrotliEncoderCompressStream (void *, int32_t, void *, void *, void *, void *, void *);
     void * BrotliEncoderCreateInstance (void *, void *, void *);
@@ -336,6 +337,7 @@ static const Entry s_libSystem_IO_Compression_Native [] = {
     DllImportEntry(BrotliDecoderDecompressStream) // System.IO.Compression.Brotli
     DllImportEntry(BrotliDecoderDestroyInstance) // System.IO.Compression.Brotli
     DllImportEntry(BrotliDecoderIsFinished) // System.IO.Compression.Brotli
+    DllImportEntry(BrotliDecoderSetParameter) // System.IO.Compression.Brotli
     DllImportEntry(BrotliEncoderCompress) // System.IO.Compression.Brotli
     DllImportEntry(BrotliEncoderCompressStream) // System.IO.Compression.Brotli
     DllImportEntry(BrotliEncoderCreateInstance) // System.IO.Compression.Brotli
@@ -602,7 +604,7 @@ typedef struct PInvokeTable {
 
 static PInvokeTable s_PInvokeTables[] = {
     {"libSystem.Globalization.Native", s_libSystem_Globalization_Native, 34},
-    {"libSystem.IO.Compression.Native", s_libSystem_IO_Compression_Native, 51},
+    {"libSystem.IO.Compression.Native", s_libSystem_IO_Compression_Native, 52},
     {"libSystem.Native", s_libSystem_Native, 147},
     {"wasi:clocks/monotonic-clock@0.2.8", s_wasi_3A_clocks_2F_monotonic_clock_40_0_2_8, 4},
     {"wasi:http/outgoing-handler@0.2.8", s_wasi_3A_http_2F_outgoing_handler_40_0_2_8, 1},

The managed code that feeds these tables ([UnmanagedCallersOnly] methods, P/Invokes, QCalls)
changed without the tables being regenerated. To fix, run from the repository root:

  ./build.sh clr+libs -os wasi -c Release
  src/coreclr/vm/wasm/generate-coreclr-helpers.sh -c Release --target-os wasi

and commit the changes under src/coreclr/vm/wasm/wasi/.

  8. dotnet-policy-service commented on Oct 27, 2026

    @dotnet-policy-service
    dotnet-policy-serviceBot
    on Oct 27, 2026 – with Dotnet Policy Service
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    Tagging subscribers to this area: @agocke
    See info in area-owners.md if you want to be subscribed.

  9. lewing
    closed this as completedon Oct 27, 2026
  10. github-project-automation
    moved this to Done in Runtime Infraon Oct 27, 2026
  11. dotnet-policy-service
    removed
    untriagedNew issue has not been triaged by the area owner
    on Oct 27, 2026

  12. lewing commented on Oct 27, 2026

    @lewing
    lewing
    on Oct 27, 2026
    Member

    This is already fixed on main, so no regeneration PR is needed.

    The three hunks in the CI diff (the BrotliDecoderSetParameter declaration, its DllImportEntry, and the libSystem.IO.Compression.Native table count 51 -> 52) are all present in src/coreclr/vm/wasm/wasi/callhelpers-pinvoke.cpp on current main (152ad965267). They arrived in #135903 (2026-10-27 18:32Z), which regenerated the tables as part of an unrelated change.

    Why the check failed on #136519: its base (f6b68e03fc, 15:28Z) predates #135903, so the tables it was tested against were still stale.

    How the tables got stale:

    This is a semantic merge race between those two PRs rather than a missed step in either one. I only compared the three hunks against main; I did not regenerate the tables locally.

    Note

    This comment was drafted with GitHub Copilot.

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