Test failure: JIT/Regression/JitBlue/Runtime_72845/Runtime_72845/Runtime_72845.cmd

[SakeTao]

Failed in: runtime-coreclr pgostress 20250926.1

Failed tests:

coreclr windows x86 Checked instrument_if_optimizing @ Windows.10.Amd64.Open
    - JIT/Regression/JitBlue/Runtime_72845/Runtime_72845/Runtime_72845.cmd

Error message:

Unhandled exception. System.TypeInitializationException: The type initializer for 'EqualityComparerPER`1' threw an exception.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.isArray(Type ty) in D:�_work1ssrcsharpsrcFSharp.Coreprim-types.fs:line 1691
   at Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.checkType@1743(Boolean er, HashSet`1 processed, Int32 index, Type[] types) in D:�_work1ssrcsharpsrcFSharp.Coreprim-types.fs:line 1758
   at Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.canUseDefaultEqualityComparer(Boolean er, Type rootType) in D:�_work1ssrcsharpsrcFSharp.Coreprim-types.fs:line 1776
   at Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.getEqualityComparer[T](Boolean er) in D:�_work1ssrcsharpsrcFSharp.Coreprim-types.fs:line 1828
   at Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.EqualityComparerPER`1..cctor() in D:�_work1ssrcsharpsrcFSharp.Coreprim-types.fs:line 1861
   --- End of inner exception stack trace ---
   at Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.GenericEqualityWithComparerIntrinsic[T](IEqualityComparer comp, T x, T y) in D:�_work1ssrcsharpsrcFSharp.Coreprim-types.fs:line 1886
   at Microsoft.FSharp.Collections.FSharpList`1.Equals(FSharpList`1 obj, IEqualityComparer comp)
   at Runtime_72845.main(String[] _arg1)

Return code:      1
Raw output file:      C:hwAD960928wBB02099EuploadsJitBlueRuntime_72845Runtime_72845output.txt
Raw output:
BEGIN EXECUTION
 "C:hwAD960928pcorerun.exe" -p "System.Reflection.Metadata.MetadataUpdater.IsSupported=false" -p "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization=true"  Runtime_72845.dll 
Expected: 100
Actual: -532462766
END EXECUTION - FAILED
FAILED
Test failed. Trying to see if dump file was created in C:cores since 9/27/2025 8:04:07 AM
Processing C:corescorerun.exe.3628.dmp
Invoking: C:Program Files (x86)Windows Kits10Debuggers�cdb.exe -c "$<C:hwAD960928		mpfxeclh.tmp" -z "C:corescorerun.exe.3628.dmp"
stdout: 
Microsoft (R) Windows Debugger Version 10.0.18362.1 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:corescorerun.exe.3628.dmp]
User Mini Dump File with Full Memory: Only application data is available


************* Path validation summary **************
Response                         Time (ms)     Location
OK                                             C:hwAD960928pPDB
Symbol search path is: C:hwAD960928pPDB
Executable search path is: 
Windows 10 Version 14393 MP (4 procs) Free x86 compatible
Product: Server, suite: TerminalServer DataCenter SingleUserTS
10.0.14393.6343 (rs1_release.230913-1727)
Machine Name:
Debug session time: Sat Sep 27 08:04:13.000 2025 (UTC + 0:00)
System Uptime: 0 days 0:23:55.695
Process Uptime: 0 days 0:00:06.000
..........................................

************* Symbol Loading Error Summary **************
Module name            Error
ntdll                  The system cannot find the file specified

You can troubleshoot most symbol related issues by turning on symbol loading diagnostics (!sym noisy) and repeating the command that caused symbols to be loaded.
You should also verify that your symbol search path (.sympath) is correct.
This dump file has an exception of interest stored in it.
The stored exception information can be accessed via .ecxr.
(e2c.ee4): CLR exception - code e0434352 (first/second chance not available)
For analysis of this file, run !analyze -v
eax=00000000 ebx=00000000 ecx=00000005 edx=00000000 esi=00000003 edi=00000003
eip=7778f3ec esp=0077a5d8 ebp=0077a768 iopl=0         nv up ei pl nz na pe nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00000206
ntdll!NtWaitForMultipleObjects+0xc:
7778f3ec c21400          ret     14h
0:000> cdb: Reading initial command '$<C:hwAD960928		mpfxeclh.tmp'
0:000> .cordll -lp "C:hwAD960928p"
The call to LoadLibrary(sos) failed, Win32 error 0n2
    "T

Stack trace:

   at TestLibrary.OutOfProcessTest.RunOutOfProcessTest(String assemblyPath, String testPathPrefix)
   at Program.<<Main>$>g__TestExecutor648|0_649(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__DisplayClass0_0&)

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[EgorBo]

failure in the newly added instrument_if_optimizing pipeline @AndyAyersMS

[AndyAyersMS]

Failure is in the codegen for Microsoft.FSharp.Core.LanguagePrimitives.HashCompare.isArray(Type ty). This seems to be bad code when devirt is disabled (as it is when we are instrumenting). It repros with

set DOTNET_JitEnableDevirtualization=0 

which does no instrumentation. Codegen in this case is

****** START compiling Microsoft.FSharp.Core.LanguagePrimitives+HashCompare:isArray(System.Type):bool (MethodHash=b2e2215b)

IN0014: 000000 push     ebp
IN0015: 000001 mov      ebp, esp
IN0016: 000003 push     edi
IN0017: 000004 push     esi
IN0018: 000005 push     ebx
IN0019: 000006 mov      esi, ecx
IN001a: 000008 xor      edi, edi

G_M56996_IG02:        ; offs=0x00000A, size=0x0013, bbWeight=1, PerfScore 8.75, gcrefRegs=000000C0 {esi edi}, byrefRegs=00000000 {}, BB01 [0000], BB02 [0001], byref, isz

IN0001: 00000A mov      ecx, esi
IN0002: 00000C mov      eax, dword ptr [esi]
IN0003: 00000E mov      eax, dword ptr [eax+0x38]
IN0004: 000011 call     [eax+0x08]System.Type:IsArrayImpl():bool:this
IN0005: 000014 test     eax, eax
IN0006: 000016 je       SHORT G_M56996_IG04
IN0007: 000018 mov      eax, 1

G_M56996_IG03:        ; offs=0x00001D, size=0x0005, bbWeight=1, PerfScore 3.00, epilog, nogc, extend

IN001b: 00001D pop      ebx
IN001c: 00001E pop      esi
IN001d: 00001F pop      edi
IN001e: 000020 pop      ebp
IN001f: 000021 ret      

G_M56996_IG04:        ; offs=0x000022, size=0x001E, bbWeight=0, PerfScore 0.00, gcVars=00000000 {}, gcrefRegs=000000C0 {esi edi}, byrefRegs=00000000 {}, BB03 [0002], gcvars, byref

IN0008: 000022 push     0
IN0009: 000024 push     0
IN000a: 000026 push     1
IN000b: 000028 mov      ecx, dword ptr [edi]
IN000c: 00002A mov      ecx, dword ptr [ecx+0x64]
IN000d: 00002D mov      ecx, dword ptr [ecx+0x10]
IN000e: 000030 push     ecx
IN000f: 000031 mov      edi, 0x899BFB4      ; 'System.Array'
IN0010: 000036 mov      ecx, edi
IN0011: 000038 mov      edx, esi
IN0012: 00003A call     CORINFO_HELP_TAILCALL
IN0013: 00003F int3     

where we use edi in IN000b without setting it to anything.