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Fix async stack walk crash for continuations with null DiagnosticIP #128496

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Merged
tommcdon merged 2 commits into from
May 23, 2026
+9 −0
Merged

Fix async stack walk crash for continuations with null DiagnosticIP #128496

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3c4999e
Fix async stack walk crash for continuations with null DiagnosticIP
tommcdon May 22, 2026
4dfff5e
Fix PCODE comparison with NULL on ARM32 musl
tommcdon May 22, 2026
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9 changes: 9 additions & 0 deletions src/coreclr/debug/di/rsstackwalk.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -915,6 +915,15 @@ HRESULT CordbAsyncStackWalk::PopulateFrame()
&nextContinuation,
&state));

// Skip continuations with null DiagnosticIP. These are infrastructure
// continuations (e.g. ValueTaskContinuation) that have no user code
// associated with them and cannot be represented as a debug frame.
if (diagnosticIP == 0)
{
m_continuationAddress = nextContinuation;
continue;
}

NativeCodeFunctionData codeData;
VMPTR_Module pModule;
mdMethodDef methodDef;
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