UnsafeAccessor with generic struct segfault #122678
Description
Description
Runtime segfaults (exit code 139) when using UnsafeAccessor to invoke method on generic struct constructed with class type.
Reproduction Steps
Given:
using System.Runtime.CompilerServices;
S<int> sInt32 = new();
Accessor<int>.M(ref sInt32);
Console.WriteLine("Int32 okay");
S<string> sString = new();
Accessor<string>.M(ref sString);
Console.WriteLine("string okay");
public struct S<T>
{
private void M() { }
}
public static class Accessor<T>
{
[UnsafeAccessor(UnsafeAccessorKind.Method, Name = "M")]
public static extern void M(ref S<T> s);
}Then:
$ dotnet run Program.cs
Int32 okay
$ echo $?
139Expected behavior
Does not segfault and prints string okay.
Actual behavior
Segfaults (exit code 139).
Regression?
No response
Known Workarounds
No response
Configuration
dotnet --info
.NET SDK:
Version: 10.0.101
Commit: fad253f51b
Workload version: 10.0.100-manifests.c57ac48b
MSBuild version: 18.0.6+fad253f51
Runtime Environment:
OS Name: Mac OS X
OS Version: 26.1
OS Platform: Darwin
RID: osx-arm64
Base Path: /usr/local/share/dotnet/sdk/10.0.101/
.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.
Host:
Version: 10.0.1
Architecture: arm64
Commit: fad253f51b
.NET SDKs installed:
10.0.100 [/usr/local/share/dotnet/sdk]
10.0.101 [/usr/local/share/dotnet/sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 10.0.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 10.0.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Other architectures found:
None
Environment variables:
Not set
global.json file:
Not found
Other information
No response