Hi Sam, do you have a way to reproduce this with a small sample or one of our samples?
From the callstack I see it is happening when it starts to render, and our view doesn't seem to be correctly initialized.

In case there is no easy way to reproduce this outside your project I prepared a debug version of our library with some extra logs to help us narrow the source of the problem.
Could you please try again using this library? https://drive.google.com/file/d/1buzExMRV-gujPsscWWI9G_KQJoRBbmrF/view?usp=sharing
To enable the logging go to NoesisSettings and set "Log Verbosity" to "Normal" so our logs are output to Editor.log .

Thanks for your collaboration.

I got a crash immediately upon starting unity with the DLL you gave me. Re-ran and no crash. Not sure why?

However, I then tried play mode and got the same crash as before. I've attached both crash reports here.

Will try to see what's going on and if I can make a smaller repro case.

Forgot to mention it, but I did turn the logging level to "normal" as advised.

I generated a new library with more logs on the code that seems to be the cause of the problem.
Could you please check again: https://drive.google.com/file/d/19ivzgVZ4jq2gQ57BIIzhzss0EBABA_b4/view?usp=sharing

Sorry for the inconvenience.

Ok, attached the crash. Relevant logs:

[noesis] 'Assets/Scripts/Runtime/Client/UI/Themes/TorchTheme.Colors.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/Themes/TorchTheme.Brushes.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/Themes/TorchTheme.Fonts.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/Themes/TorchTheme.Styles.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/Themes/TorchTheme.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUD Icons.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUD Icons.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUD Templates.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDInteractView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDDevStatsView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDEquipmentSwapView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDAbilityView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDAbilityView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDAbilityView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDAbilityView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDAbilityView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDGameStateView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUDPaperDollView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/Ascension Templates.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/AscensionMapView.xaml' loaded
[noesis] 'Assets/Scripts/Runtime/Client/UI/HUD/HUD.xaml' loaded
[noesis] View.UpdateRoot: 1
[noesis] Renderer.UpdateRenderTree
[noesis] Renderer.RendererQueue: Read=0, Write=0
[noesis] RenderTree.NeedsOffscreen

We have a few modifications to the Noesis C# code; I don't think these are the cause but I'm not 100% sure (sorry I wasn't more clear about this earlier).

We have added an option so we can explicitly tell our Noesis View when to update rather than in LateUpdate() (our game is written in DOTS so we needed a custom place to trigger the update). The other change is that we added a couple methods on NoesisView so we could render from a custom SRP render pass.

Here is the relevant code changes we made:

Noesis View:

public void RenderOffScreenHD(CommandBuffer cmd)
{
    if (_uiView != null && _visible)
    {
        NoesisRenderer.RenderOffscreen(_uiView, cmd);
    }
}
public void RenderOnScreenHD(CommandBuffer cmd)
{
    if (_uiView != null && _visible)
    {
        NoesisRenderer.RenderOnscreen(_uiView, true, cmd);
        _updatePending = true;
    }
}

Our custom render pass:

using UnityEngine.Rendering;
using UnityEngine.Rendering.HighDefinition;
public abstract class NoesisRenderPass : CustomPass
{
protected NoesisView View;
protected override void Execute(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera camera, CullingResults cullingResult)
{
if (View == null)
{
View = camera.camera.GetComponent<NoesisView>();
}
}
}
public class NoesisOnScreenRenderPass : NoesisRenderPass
{
protected override void Execute(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera camera, CullingResults cullingResult)
{
base.Execute(renderContext, cmd, camera, cullingResult);
if (View != null)
{
View.RenderOnScreenHD(cmd);
}
}
}
public class NoesisOffScreenRenderPass : NoesisRenderPass
{
protected override void Execute(ScriptableRenderContext renderContext, CommandBuffer cmd, HDCamera camera, CullingResults cullingResult)
{
base.Execute(renderContext, cmd, camera, cullingResult);
if (View != null)
{
View.RenderOffScreenHD(cmd);
}
}
}

I am trying to make a minimal example that takes advantage of these changes to see if that reproduces the bug because just using 2019.3.14f1 with the default samples seems to be solid :(

We removed all the custom render code we had added (not necessary anymore anyhow), but we still hit the crash.

We're happy to debug further here but we'll need to build a debug version of Noesis. I think we might have source code access.

Thanks for the help debugging this.
The logs confirmed my suspicions and I have a clear view on what is happening.
We'll fix it for the next release.