[Bug]: SDL3+OpenGL3 seems generally broken for `win-x86` RID

[fkelava]

Pre-submission Checklist

• I have read the FAQ Wiki
• I have searched existing issues and this is not a duplicate
• I am using the latest version of Hexa.NET.ImGui

Hexa.NET.ImGui Version

2.2.9

Bug Description

This is just a report for the future so someone else running into it doesn't get confused. I know you're busy and don't expect you to act on it or fix it any time soon.

In this repo is an ExampleSDL3OpenGL3. If this example is compiled with -r win-x86 or <RuntimeIdentifier>win-x86</RuntimeIdentifier>, it will only in Release mode fail with a spurious:

Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
   at Program.<Main>$(String[] args) in D:\Hexa.NET.ImGui\Examples\ExampleSDL3OpenGL3\Program.cs:line 99

Core dump shows a nondescript access violation. It seems to occur at or around ImGuiImplOpenGL3.RenderDrawData, at which point I can no longer follow the trace due to lack of symbols.

This is not a bug specifically with the example, but generally somewhere in the OGL or SDL bits. Even if you strictly replicate the approach of the upstream ImGui SDL3+OGL3 example, it will fail in the same way. I used the same exact package versions as the example in my own project to ensure parity, and it reproduces with perfect reliability.

Example dump attached. ExampleSDL3OpenGL3.exe.16208.dmp

The issue does not recur with RID win-x64. I do not know whether it occurs on non-Windows RIDs.

Steps to Reproduce

1. Clone Hexa.NET.ImGui at tag v2.2.9.
2. Set the RuntimeIdentifier to win-x86.
3. Run ExampleSDL3OpenGL3 in Release.
4. Kaboom.

Expected Behavior

No kaboom.

Platform

Windows

.NET Version

net9.0;net10.0

[JunaMeinhold]

Hi

That's related to ABI and POD vs non POD, and would be fixed by the drafted PR.

[fkelava]

Got it, thanks for the swift response. I'll keep an eye out and retest whenever it gets merged. In the meantime I'll just work around it.