Built project crashes the editor

[romanstetsenko]

Hi.
If try...with expression is used in any part of F# code, it crashes the editor.
Message from Crash Reporter:

UE4Editor_UnrealCLR!UnrealCLR::Module::OnWorldPostInitialization() [D:\games\Epic Games\MyProject\Plugins\UnrealCLR\Source\UnrealCLR\Private\UnrealCLR.cpp:1352]
UE4Editor_UnrealCLR!TBaseRawMethodDelegateInstance<0,UnrealCLR::Module,void __cdecl(UWorld *,UWorld::InitializationValues),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\games\Epic Games\UE_4.26\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:469]

Code for reproducing:

namespace Game

open System.Drawing
open UnrealEngine.Framework

module Main = // Indicates the main entry point for automatic loading by the plugin
    let OnWorldBegin() = 
        try 
            Debug.AddOnScreenMessage(-1, 10.0f, Color.DeepPink, "Hello, Unreal Engine!")
        with e -> Debug.AddOnScreenMessage(-1, 10.0f, Color.Red, e.Message)

Also, I created a separate module with the exception handling expression and called it from the module Main - the editor crashed.
Then, I tried to call the separate module from an entry point in C# with the same result :(

[nxrighthere]

What platform do you use?

[romanstetsenko]

Edition Windows 10 Pro N
Version 21H1
OS build 19043.1110
Experience Windows Feature Experience Pack 120.2212.3530.0

[nxrighthere]

I'm unable to reproduce this.

How do you compile your project? Could you send me source files?

[romanstetsenko]

Nothing fancy, I use dotnet build.
Plugin is downloaded from here https://github.com/nxrighthere/UnrealCLR/archive/refs/tags/1.29.zip. Installation was completed succsesfully according to the https://github.com/nxrighthere/UnrealCLR#auto
All C# tests pass w/o issues.
Unreal project is very default Games -> Blank -> C++ With Starter Content for Desktop
Level: /Game/StarterContent/Maps/Minimal_Default.Minimal_Default'
Output Log after editor is loaded:

LogPluginManager: Mounting plugin UnrealCLR
LogUnrealCLR: Display: UnrealCLR::Module::StartupModule: Host path set to "d:/games/Epic Games/prj/MyProject/Plugins/UnrealCLR/Runtime/Win64/host/fxr/5.0.6/hostfxr.dll"
LogUnrealCLR: Display: UnrealCLR::Module::StartupModule: Host library loaded successfuly!
LogUnrealCLR: Display: UnrealCLR::Module::StartupModule: Host functions loaded successfuly!
LogUnrealCLR: Display: UnrealCLR::Module::StartupModule: Host runtime assembly loaded succesfuly!
LogUnrealCLR: Display: UnrealCLR::Module::StartupModule: Host runtime assembly initialized succesfuly!
LogUnrealCLR: Display: UnrealCLR::Module::StartupModule: Host loaded succesfuly!

MyDotNetTest.zip

[nxrighthere]

Nothing fancy, I use dotnet build.

You should publish the project as stated in the manual instead of just building it.

[romanstetsenko]

Oh, my. It was stupid of me. Thank you for the help.

[nxrighthere]

I'll try to handle such cases on the plugin side to avoid confusion.

[nxrighthere]

Resolved in 60315d6.