WebView2 crashes, but unsure if it's a bug or expected behavio

[kyle-mcknight]

When creating a new CoreWebView2 instance with the following code
var op = new CoreWebView2EnvironmentOptions($"--disable-web-security --allow-file-access-from-files --remote-debugging-port=9229");

And when our application opens another website within an iframe AND the devtools are open, the application crashes with the following stack trace

Unhandled Exception: System.InvalidOperationException: CoreWebView2 members cannot be accessed after the WebView2 control is disposed. ---> System.Runtime.InteropServices.COMException: The group or resource is not in the correct state to perform the requested operation. (Exception from HRESULT: 0x8007139F)
    at Microsoft.Web.WebView2.Core.Raw.ICoreWebView2Controller.MoveFocus(COREWEBVIEW2_MOVE_FOCUS_REASON reason)
    at Microsoft.Web.WebView2.Core.CoreWebView2Controller.MoveFocus(CoreWebView2MoveFocusReason reason)
    --- End of inner exception stack trace ---
    at Microsoft.Web.WebView2.Core.CoreWebView2Controller.MoveFocus(CoreWebView2MoveFocusReason reason)
    at Microsoft.Web.WebView2.Wpf.WebView2.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
    at System.Windows.Interop.HwndHost.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
    at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
    at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
    at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
    at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
    at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

Not sure if this should be reported as a bug or this is a browser problem in general vs a webview2 problem. I'm not familiar enough with how browsers work in that fashion.

[champnic]

Hey @kyle-mcknight - thanks for the question! Do you have a small sample app that can reproduce this issue?

Something is making the WebView2 be disposed, and it's unclear whether it's coming from the host app side, or perhaps a crash in the browser processes. You can try listening to the BrowserProcessFailed event to see if that hits first.

[r-cass]

Hey @champnic i'm experiencing the issue too with version 1.0.992.28 (nugget) for WPF, installed runtime Edge WebView2 Runtime 94.0.992.50. I can provide you a sample project to reproduce the issue, however their is nothing more than a source url binding on the webview. By my side, this occurs randomly by following this scenario :

1. Start a file download in a popup
2. Cancel file download
3. Close the popup

System.InvalidOperationException
  HResult=0x80131509
  Message=CoreWebView2 members cannot be accessed after the WebView2 control is disposed.
  Source=Microsoft.Web.WebView2.Core
  StackTrace:
   at Microsoft.Web.WebView2.Core.CoreWebView2Controller.MoveFocus(CoreWebView2MoveFocusReason reason)
   at Microsoft.Web.WebView2.Wpf.WebView2.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndHost.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

Inner Exception 1:
COMException: The group or resource is not in the correct state to perform the requested operation. (Exception from HRESULT: 0x8007139F)

I tried listening to the CoreWebView2.ProcessFailed event, but the exception is thrown first.

Edit: I added related crash dump file (from my binary directory \EBWebView\Crashpad\reports)
64341268-9fef-4d38-8c07-c556dd8ad5a9.zip

Stack:

[fvanheeswijk]

@r-cass Thank you for the reference to my issue! I'm curious how did you get the msedge.dll internal code visible? Are there (publicly available) PDB's you can download somewhere?

[r-cass]

@fvanheeswijk Aw, these PDB's are available publicly. First I opened the dump file with visual studio but I was unable to get symbols neither. However as a native and not a managed dump, I gave a try to windbg preview app, this way, fortunaly, symbols were loaded successfully. Nothing more ^^

[exchange321]

Are there further findings around ^? We're observing the same issue too.

[kyle-mcknight]

Hey, I can't recall what version helped, but when we updated to a later version, this worked for us with no changes from us. If I can find the version, I'll post it.

[kyle-mcknight]

We were originally using version 93.0.0961.47 when we ran into the issue.

Version 105.0.1343.42 fixed it for our situation.