Added a new crash dump file.

I have investigate it a bit further and it seems that the crash is likely related to the fact that Binding to the DataContext is used INSIDE the ControlTemplate.
So as a simple example, I have created a style that sets a Template and inside it uses a Binding to the ViewModel property.
I found out that if that Binding is never used anywhere else but only inside the ControlTemplate, then Noesis will crash on the first usage of that control template/style.
But if that Binding to the property is used directly in some control then there is no crash!

<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Grid>
<TextBlock x:Name="ButtonText" Text="{Binding TestObject.TestProperty}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

It will crash if used in the ContentControl like that:

<ContentControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Width="Auto" Height="Auto">
<StackPanel>
<Button/>
</StackPanel>
</ContentControl>

But it will not crash anymore if used this way:

<ContentControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Width="Auto" Height="Auto">
<StackPanel>
<Button Content="{Binding TestObject.TestProperty}"/>
<Button/>
</StackPanel>
</ContentControl>

I hope it makes sense. Please let me know if you need any additional information.

Thanks for the detailed info, the crash dumps point me to a problem initializing an element when applying the template on the control.
It seems that the binding is modifying a value that invalidates some data that is being iterated, I'll try to reproduce and fix it as soon as possible.

I've been trying to reproduce the crash using both examples without success, it worked for me in Unreal and using our XamlPlayer.

Would it be possible for you to generate new crash dumps with the following debug library of Noesis?
https://drive.google.com/file/d/1QUtlPTYGkpeX77EoW83VBhivPU6v4Q-9/view?usp=sharing

Or if you can attach a small Unreal project that reproduces the crash that will be even better.

I need some more information to confirm what I think is the source of the problem.
Thanks for your feedback.

Hey Sergio,

Should I just take Noesis.dll from that library?

Cheers,
Sergey

Yes, place that Noesis.dll inside the Binaries folder of your project.

Hi Sergio,

Unfortunately, that zip is recognised by googledrive as infected for some reason and it doesn't let me to download it. Can you please just zip the dll file and send it to me by the email instead?

Cheers,
Sergey

Sure, mail sent.

Hi Sergio,

The crash now looks different. I haven't been able to reproduce it yet with the simple example but I will spend some time tying to simplify it as much as possible,

Cheers,
Sergey

I have skipped two exceptions and got the same crash as before. However this one has crashed in the situation when the original library would not.

This crash is on file import when I try to import the Window xaml with that problematic control as a child.

Hello Sergio,

It looks like the problem is likely deeper than it seemed at the beginning and in my case is related to the fact that I stream level instance right after the initialisation of the Noesis view and its viewmodel. I will keep investigating further and also will try the new dll you sent earlier.

Cheers,
Sergey

Hey Sergio,

I managed to reproduce the issue and sent you more details by the email. Here is the latest crash dump using debug Noesis.dll.

Cheers,
Sergey