JIT: Assertion failed 'newType == TYP_I_IMPL' during 'Allocate Objects'

[jakobbotsch]

// Generated by Fuzzlyn v3.0 on 2025-05-20 21:40:51
// Run on X64 Windows
// Seed: 11262416476118799467-vectort,vector128,vector256,x86aes,x86avx,x86avx2,x86avx512bw,x86avx512bwvl,x86avx512cd,x86avx512cdvl,x86avx512dq,x86avx512dqvl,x86avx512f,x86avx512fvl,x86avx512fx64,x86bmi1,x86bmi1x64,x86bmi2,x86bmi2x64,x86fma,x86lzcnt,x86lzcntx64,x86pclmulqdq,x86popcnt,x86popcntx64,x86sse,x86ssex64,x86sse2,x86sse2x64,x86sse3,x86sse41,x86sse41x64,x86sse42,x86sse42x64,x86ssse3,x86x86base
// Reduced from 52.0 KiB to 0.5 KiB in 00:03:45
// Hits JIT assert in Release:
// Assertion failed 'newType == TYP_I_IMPL' in 'Program:Main(Fuzzlyn.ExecutionServer.IRuntime)' during 'Allocate Objects' (IL size 47; hash 0xade6b36b; FullOpts)
// 
//     File: D:\a\_work\1\s\src\coreclr\jit\objectalloc.cpp Line: 2427
// 
using System;
using System.Numerics;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;

public class C1
{
}

public struct S2
{
    public Vector<ushort> F0;
}

public struct S3
{
    public S2 F3;
    public C1 F5;
}

public class Program
{
    public static S3 s_1;
    public static void Main()
    {
        S3 vr0 = s_1;
        S2 vr1 = vr0.F3;
        vr0.F5 = new C1();
        System.Console.WriteLine(vr1.F0);
    }
}

cc @AndyAyersMS

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