Reproduction steps ({*}Unity 2021 or 2022{*}):
# Create a new project
# Open the Package Manager by navigating to Window → *Package Manager*
# Click the *+* symbol and choose *Add package by name...*
# Type *com.unity.xr.interaction.toolkit* into the name field and *2.4.3* into the version field
# Navigate to the "Samples" tab and *import* the *Starter Assets*
# In the *Project* view, navigate to *Samples/XR Interaction Toolkit/2.4.3/Starter Assets* and open the *DemoScene.unity*
# Make sure the *Scene view* has loaded in everything correctly (materials).
# In Package Manager, click the *+* symbol again and *Add package by name...*
# Type *com.unity.xr.interaction.toolkit* into the name field and *2.5.4* into the version field and press enter
# Navigate to the "Samples" tab and *Update* the *Starter Assets*
# Click *Yes* when prompted to overwrite existing assets.
# Observe the crash

Note: For reproduction on {*}Unity 6{*}, you can use package version *3.0.1* and update to *3.0.4*

Reproducible with: 2022.3.7f1, 2022.3.37f1, 2021.3.38f1, 6000.0.0f1, 6000.0.11f1
Not reproducible with: ?
Regressed in: ?

Reproduced on: Windows 10 Pro
Not reproducible on: No other environment tested

{*}WORKAROUNDS{*}:
* Delete the existing/older XRI samples before updating to the latest version.
* Close active scene or create a new blank scene before Updating - *{color:#ff0000}This is a key piece of information when narrowing down the crash. It only happens when a scene is open that uses assets from the sample.{color}*

{quote} 
{code:java}
================================================================= Native Crash Reporting ================================================================= Got a UNKNOWN while executing native code. This usually indicates a fatal error in the mono runtime or one of the native libraries  used by your application. =================================================================   ================================================================= Managed Stacktrace: =================================================================   at <unknown> <0xffffffff>   at UnityEditor.AssetDatabase:Refresh <0x000e0>   at UnityEditor.AssetDatabase:Refresh <0x0007a>   at UnityEditor.PackageManager.UI.Internal.AssetDatabaseProxy:Refresh <0x00082>   at UnityEditor.PackageManager.UI.Sample:Import <0x00bc2>   at UnityEditor.PackageManager.UI.Internal.PackageDetailsSampleItem:OnImportButtonClicked <0x01092>   at UnityEngine.UIElements.Clickable:Invoke <0x000c6>   at UnityEngine.UIElements.Clickable:ProcessUpEvent <0x00712>   at UnityEngine.UIElements.Clickable:OnMouseUp <0x001c9>   at UnityEngine.UIElements.EventCallbackFunctor`1:Invoke <0x003c9>   at UnityEngine.UIElements.EventCallbackRegistry:InvokeCallbacks <0x00537>   at UnityEngine.UIElements.CallbackEventHandler:HandleEvent <0x008ba>   at UnityEngine.UIElements.CallbackEventHandler:HandleEventAtCurrentTargetAndPhase <0x0008b>   at UnityEngine.UIElements.CallbackEventHandler:HandleEventAtTargetPhase <0x0016a>   at UnityEngine.UIElements.MouseCaptureDispatchingStrategy:DispatchEvent <0x01212>   at UnityEngine.UIElements.EventDispatcher:ApplyDispatchingStrategies <0x002b5>   at UnityEngine.UIElements.EventDispatcher:ProcessEvent <0x0046a>   at UnityEngine.UIElements.EventDispatcher:ProcessEventQueue <0x0035a>   at UnityEngine.UIElements.EventDispatcher:OpenGate <0x001ea>   at UnityEngine.UIElements.EventDispatcherGate:Dispose <0x0008a>   at UnityEngine.UIElements.EventDispatcher:ProcessEvent <0x01442>   at UnityEngine.UIElements.EventDispatcher:Dispatch <0x0043a>   at UnityEngine.UIElements.BaseVisualElementPanel:SendEvent <0x0017a>   at UnityEngine.UIElements.UIElementsUtility:DoDispatch <0x00c62>   at UnityEngine.UIElements.UIElementsUtility:UnityEngine.UIElements.IUIElementsUtility.ProcessEvent <0x002c2>   at UnityEngine.UIElements.UIEventRegistration:ProcessEvent <0x00233>   at <>c:<.cctor>b__1_2 <0x0009a>   at UnityEngine.GUIUtility:ProcessEvent <0x00114>   at <Module>:runtime_invoke_void_int_intptr_intptr& <0x001b5> ================================================================= Received signal SIGSEGV Obtained 66 stack frames 0x00007ff6663eea1f (Unity) MonoBehaviour::Transfer<GenerateTypeTreeTransfer> 0x00007ff666418c4d (Unity) MonoBehaviour::VirtualRedirectTransfer 0x00007ff6664fba0e (Unity) TypeTreeCache::GetTypeTree 0x00007ff6664e9c1e (Unity) SerializedFile::SerializedType::CompareAgainstNewType 0x00007ff6664effa2 (Unity) SerializedFile::ReadObject 0x00007ff6664efd16 (Unity) SerializedFile::ReadObject 0x00007ff6664d4a65 (Unity) PersistentManager::ReadAndActivateObjectThreaded 0x00007ff6664d1fc4 (Unity) PersistentManager::LoadObjectsThreaded 0x00007ff6664d1d0c (Unity) PersistentManager::LoadObjects 0x00007ff6678dcd6e (Unity) ImportedAssetsReloadList::ReloadAssetInstances 0x00007ff6678dce98 (Unity) ImportedAssetsReloadList::ReloadImportedAssetIfLoaded 0x00007ff66785d4d7 (Unity) AssetImportManager::Import 0x00007ff667860711 (Unity) ImportOutOfDateAssets 0x00007ff66786b419 (Unity) RefreshInternalV2 0x00007ff66787315f (Unity) StopAssetImportingV2Internal 0x00007ff66786c74c (Unity) RefreshV2 0x00007ff6677e0fe0 (Unity) AssetDatabase::Refresh 0x00007ff665c0a20f (Unity) AssetDatabase_CUSTOM_Refresh 0x000002817a8a0671 (Mono JIT Code) (wrapper managed-to-native) UnityEditor.AssetDatabase:Refresh (UnityEditor.ImportAssetOptions) 0x000002817a8a051b (Mono JIT Code) UnityEditor.AssetDatabase:Refresh () 0x000002817a8a0423 (Mono JIT Code) UnityEditor.PackageManager.UI.Internal.AssetDatabaseProxy:Refresh () 0x000002817a8881e3 (Mono JIT Code) UnityEditor.PackageManager.UI.Sample:Import (UnityEditor.PackageManager.UI.Sample/ImportOptions) 0x000002817a881093 (Mono JIT Code) UnityEditor.PackageManager.UI.Internal.PackageDetailsSampleItem:OnImportButtonClicked () 0x000002817a87eb27 (Mono JIT Code) UnityEngine.UIElements.Clickable:Invoke (UnityEngine.UIElements.EventBase) 0x000002817a87d8a3 (Mono JIT Code) UnityEngine.UIElements.Clickable:ProcessUpEvent (UnityEngine.UIElements.EventBase,UnityEngine.Vector2,int) 0x000002817a87ceaa (Mono JIT Code) UnityEngine.UIElements.Clickable:OnMouseUp (UnityEngine.UIElements.MouseUpEvent) 0x0000028177a2f84a (Mono JIT Code) UnityEngine.UIElements.EventCallbackFunctor`1<TEventType_REF>:Invoke (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.PropagationPhase) 0x0000028177a2eca8 (Mono JIT Code) UnityEngine.UIElements.EventCallbackRegistry:InvokeCallbacks (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.PropagationPhase) 0x000002817795c25b (Mono JIT Code) UnityEngine.UIElements.CallbackEventHandler:HandleEvent (UnityEngine.UIElements.EventBase) 0x000002817795b8dc (Mono JIT Code) UnityEngine.UIElements.CallbackEventHandler:HandleEventAtCurrentTargetAndPhase (UnityEngine.UIElements.EventBase) 0x000002817795ae5b (Mono JIT Code) UnityEngine.UIElements.CallbackEventHandler:HandleEventAtTargetPhase (UnityEngine.UIElements.EventBase) 0x000002817a7d7013 (Mono JIT Code) UnityEngine.UIElements.MouseCaptureDispatchingStrategy:DispatchEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel) 0x0000028177a45976 (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:ApplyDispatchingStrategies (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel,bool) 0x0000028177a442fb (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:ProcessEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel) 0x0000028177923ceb (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:ProcessEventQueue () 0x00000281779238eb (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:OpenGate () 0x000002817792368b (Mono JIT Code) UnityEngine.UIElements.EventDispatcherGate:Dispose () 0x0000028177a452d3 (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:ProcessEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel) 0x0000028177a37dab (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:Dispatch (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel,UnityEngine.UIElements.DispatchMode) 0x0000028177a378db (Mono JIT Code) UnityEngine.UIElements.BaseVisualElementPanel:SendEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.DispatchMode) 0x00000281793726d3 (Mono JIT Code) UnityEngine.UIElements.UIElementsUtility:DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel) 0x0000028179371673 (Mono JIT Code) UnityEngine.UIElements.UIElementsUtility:UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (int,intptr,bool&) 0x0000028179371094 (Mono JIT Code) UnityEngine.UIElements.UIEventRegistration:ProcessEvent (int,intptr) 0x0000028179370dab (Mono JIT Code) UnityEngine.UIElements.UIEventRegistration/<>c:<.cctor>b__1_2 (int,intptr) 0x0000028179370855 (Mono JIT Code) UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) 0x0000028179370a96 (Mono JIT Code) (wrapper runtime-invoke) <Module>:runtime_invoke_void_int_intptr_intptr& (object,intptr,intptr,intptr) 0x00007ffa2a1ce0e4 (mono-2.0-bdwgc) mono_jit_runtime_invoke (at C:/build/output/Unity-Technologies/mono/mono/mini/mini-runtime.c:3445) 0x00007ffa2a10eb84 (mono-2.0-bdwgc) do_runtime_invoke (at C:/build/output/Unity-Technologies/mono/mono/metadata/object.c:3066) 0x00007ffa2a10ed1c (mono-2.0-bdwgc) mono_runtime_invoke (at C:/build/output/Unity-Technologies/mono/mono/metadata/object.c:3113) 0x00007ff666440aa4 (Unity) scripting_method_invoke 0x00007ff66641f724 (Unity) ScriptingInvocation::Invoke 0x00007ff66641a375 (Unity) ScriptingInvocation::Invoke<void> 0x00007ff66656c66a (Unity) Scripting::UnityEngine::GUIUtilityProxy::ProcessEvent 0x00007ff666f5c378 (Unity) GUIView::ProcessRetainedMode 0x00007ff667521394 (Unity) GUIView::OnInputEvent 0x00007ff666f5c2c3 (Unity) GUIView::ProcessInputEventFromAPI 0x00007ff666f5c198 (Unity) GUIView::ProcessInputEvent 0x00007ff66752219c (Unity) GUIView::ProcessEventMessages 0x00007ff66751beba (Unity) GUIView::GUIViewWndProc 0x00007ffb4657ef5c (USER32) CallWindowProcW 0x00007ffb4657e684 (USER32) DispatchMessageW 0x00007ff6674f56f3 (Unity) MainMessageLoop 0x00007ff6674fa870 (Unity) WinMain 0x00007ff6688df34e (Unity) __scrt_common_main_seh 0x00007ffb46d27344 (KERNEL32) BaseThreadInitThunk 0x00007ffb46f5cc91 (ntdll) RtlUserThreadStart{code}
 
{quote}