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ArgumentOutOfRangeException Crash in Python Packages when typing package name #1229
Description
Activity
I can confirm that I've had a similar issue with one trainer. When I open the Python Packages for One Trainer and type "xf" into search, Matrix throws an error and crashes. If I search for anything else, and THEN "xf" it doesn't crash
but then if I close and reopen python packages for one trainer, it crashes on a first search of "xf."
A quick test on other packages doesn't have the same errorThis issue is stale because it has been open 60 days with no activity. Remove the stale label or comment, else this will be closed in 7 days.
Bad bot. Problem still exists in 2.14.2
This issue is stale because it has been open 60 days with no activity. Remove the stale label or comment, else this will be closed in 7 days.
Issue is still unresolved
Still occurring, though now it's intermittent, in 2.15.0
Confirmed multiple types by searching for "xformers" in "Python Packages" on A1111 and "OneTrainer" packages. Had to search/clear cycle a few times before the exception popped up.
ArgumentOutOfRangeException at System.Collections.Generic.List`1.get_Item(Int32 index) at System.Collections.ObjectModel.Collection`1.System.Collections.IList.get_Item(Int32 index) at Avalonia.Controls.ItemsSourceView`1.GetAt(Int32 index) at Avalonia.Controls.Selection.SelectedItems`1.GetEnumerator()+MoveNext() at System.Linq.Enumerable.<ToArray>g__EnumerableToArray|314_0[TSource](IEnumerable`1 source) at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source) at Avalonia.Controls.Selection.InternalSelectionModel.OnSelectionChanged(Object sender, SelectionModelSelectionChangedEventArgs e) at Avalonia.Controls.Selection.SelectionModel`1.CommitOperation(Operation operation, Boolean raisePropertyChanged) at Avalonia.Controls.Selection.InternalSelectionModel.OnSourceCollectionChangeFinished() at Avalonia.Controls.Utils.CollectionChangedEventManager.Entry.<Avalonia.Utilities.IWeakEventSubscriber<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.OnEvent>g__Notify|6_0(INotifyCollectionChanged incc, NotifyCollectionChangedEventArgs args, WeakReference`1[] listeners) at Avalonia.Threading.DispatcherOperation.InvokeCore() at Avalonia.Threading.DispatcherOperation.Execute() at Avalonia.Threading.Dispatcher.ExecuteJob(DispatcherOperation job) at Avalonia.Threading.Dispatcher.ExecuteJobsCore(Boolean fromExplicitBackgroundProcessingCallback) at Avalonia.Threading.Dispatcher.Signaled() at Avalonia.Win32.Win32Platform.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam) at Avalonia.Win32.Interop.UnmanagedMethods.DispatchMessage(MSG& lpmsg) at Avalonia.Win32.Win32DispatcherImpl.RunLoop(CancellationToken cancellationToken) at Avalonia.Threading.DispatcherFrame.Run(IControlledDispatcherImpl impl) at Avalonia.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at Avalonia.Threading.Dispatcher.MainLoop(CancellationToken cancellationToken) at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.StartCore(String[] args) at StabilityMatrix.Avalonia.Program.Main(String[] args)This issue is stale because it has been open 60 days with no activity. Remove the stale label or comment, else this will be closed in 7 days.
This issue was closed because it has been stale for 7 days with no activity.
- added a commit that references this issue
on Jun 8, 2026
What happened?
Trying to search for a python package (xformers) in the sd-webui package entry threw an exception (details pasted below, full zipped log attached)
Steps to reproduce
stabilitymatrix-log-2025-04-25-18-19-52.zip
Relevant logs
Version
v2.14.0
What Operating System are you using?
Linux