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[wasm][R2R] Runtime_70259 asserts in ToPortableEntryPoint #133169
Description
Description
JIT/Regression/JitBlue/Runtime_70259 passes in the CoreCLR browser-wasm interpreter lane, but asserts when the test assembly is compiled with Crossgen2 and run as ReadyToRun. The test creates an open delegate for an interface method and invokes it through a tail call.
The interpreter-only version of this assertion was tracked by #124221 and fixed by #125138. The ReadyToRun test-assembly path remains broken.
Reproduction Steps
- Build the CoreCLR browser-wasm runtime test layout.
- Build
JIT/Regression/Regression_2. - Run its generated script with
RunCrossGen2=1andCompositeBuildMode=1soRuntime_70259.dllis compiled to wasm ReadyToRun.
The relevant test is src/tests/JIT/Regression/JitBlue/Runtime_70259/Runtime_70259.il.
Expected behavior
Runtime_70259 passes and returns 100, matching the interpreter lane.
Actual behavior
The ReadyToRun run aborts with:
ASSERT FAILED
Expression: portableEntryPoint->IsValid()
Location: src/coreclr/vm/precode_portable.cpp:109
Function: ToPortableEntryPoint
Frame (InterpreterFrame):
0) System.Func`2[__Canon,Int32]::IL_STUB_DelegateShuffleThunk, IR_0014
Expected: 100
Actual: 1
Regression?
No known regression. This was exposed by adding test-assembly ReadyToRun coverage to the merged CoreCLR browser-wasm runtime-test runner.
Known Workarounds
Skip this test when both wasm and ReadyToRun test-assembly execution are active. The interpreter lane remains enabled.
Configuration
- CoreCLR browser-wasm, Checked
- wasm32
- Test assembly compiled by Crossgen2 with ReadyToRun enabled
Other information
Related issues include #124221 (the now-fixed interpreter case) and #130840 (a different wasm ReadyToRun failure involving open-instance virtual/interface delegates).
Note
This issue was authored with the assistance of GitHub Copilot.
Activity
dotnet-policy-service commentedon Sep 3, 2026
Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
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dotnet-policy-service commentedon Sep 3, 2026
Tagging subscribers to this area: @agocke
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MihuBot commentedon Sep 3, 2026
I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):
lewing commentedon Sep 4, 2026
Duplicate of #131886, which was filed on 2026-08-05 — a month before this one. My search when filing did not turn it up; thanks to @lewing for spotting it.
Same defect, identical signature down to the IR offset:
portableEntryPoint->IsValid()precode_portable.cpp:109,ToPortableEntryPointMyDelegate::IL_STUB_DelegateShuffleThunk, IR_0014System.Func\2[__Canon,Int32]::IL_STUB_DelegateShuffleThunk, IR_0014`Only the test differs —
Runtime_79354there,Runtime_70259here. #131886 also already has a root-cause analysis (INTOP_CALLItreatingCID_VirtualOpenDelegateDispatchas a portable entry point) and a working prototype fix, so it is the better issue to keep. See also #130840, which looks like the same family.I have added the
Runtime_70259details to #131886 so nothing is lost.One loose end:
Runtime_70259is disabled on this path in main by anActiveIssuepointing at this now-closed issue, in bothRuntime_70259.csandRuntime_70259.il. That reference should be retargeted to #131886.Closing in favour of #131886.
Note
This comment was authored with GitHub Copilot.
[wasm][R2R] Re-enable open virtual delegate runtime tests (#134765)