Faulting module name: mono-2.0-bdwgc.dll

How do you find the cause of a unity to crash if you only get something like this (same result for Unity 2019.4.XX + 2020.1.XX):

Faulting application name: XXX.exe, version: 2020.1.1.34243, time stamp: 0x5f208d5d
Faulting module name: mono-2.0-bdwgc.dll, version: 0.0.0.0, time stamp: 0x5efa190a
Exception code: 0xc0000005
Fault offset: 0x00000000003082ea
Faulting process id: 0x7698
Faulting application start time: 0x01d66e38658bf1fd
Faulting application path: PATH_TO_EXE
Faulting module path: C:\PATH_TO_BUILD\MonoBleedingEdge\EmbedRuntime\mono-2.0-bdwgc.dll
Report Id: 2328ecae-faea-4270-93f1-c23e018ff35b
Faulting package full name:
Faulting package-relative application ID:

and sometimes for the editor

Faulting application name: Unity.exe, version: 2020.1.1.34243, time stamp: 0x5f208f49
Faulting module name: mono-2.0-bdwgc.dll, version: 0.0.0.0, time stamp: 0x5efa190a
Exception code: 0xc0000005
Fault offset: 0x00000000003082ea
Faulting process id: 0x1fac
Faulting application start time: 0x01d66e3ec759cf54
Faulting application path: C:\Program Files\Unity\Editor\2020.1.1f1\Editor\Unity.exe
Faulting module path: C:\Program Files\Unity\Editor\2020.1.1f1\Editor\Data\MonoBleedingEdge\EmbedRuntime\mono-2.0-bdwgc.dll
Report Id: 74a1f904-9b4d-45ce-a864-0df28ff133fe
Faulting package full name:
Faulting package-relative application ID:

that’s all i get. The application itself is starting, I even get log entries but something within the project seems to make it crash before the scene got completely loaded. Any ideas how to get more information out of it?

I had the Fullscreen mode at Project Settings → Player → Resolution and Presentation set to Maximized window. That kind of suppressed the error messages, I set it to windowed and finally got at least an error message I can work with.
Nevertheless this looks like an issue with Unity, you should always get at least an error message regardless if maximized or not :wink:

In my case it seems like XML Layout is causing it:
Crash!!!

Trying to add Label (UnityEngine.UI.Text) for graphic rebuild while we are already inside a graphic rebuild loop. This is not supported.

0x000001BD1A5EC11B (Mono JIT Code) UI.Xml.UIExtensions:SetOptions (UnityEngine.UI.Dropdown,System.Collections.Generic.IEnumerable`1)

I have started getting this error but when i try to do a build. Unity will sometimes crash with this error.
Have you found a fix?