Something went wrong

[Lareina86]

Microsoft PowerToys version and release channel

0.100.2

Installation method

Microsoft Store

Area(s) with issue?

General

Steps to reproduce

Version: 0.100.2.0
OS Version: Microsoft Windows NT 10.0.26200.0
IntPtr Length: 8
x64: True
Date: 9/3/2026 2:00:39 AM
Exception:
System.NullReferenceException: Object reference not set to an instance of an object.
at System.Windows.Data.BindingExpression.SetupDefaultValueConverter(Type type)
at MS.Internal.Data.PropertyPathWorker.ReplaceItem(Int32 k, Object newO, Object parent)
at MS.Internal.Data.ClrBindingWorker.AttachDataItem()
at System.Windows.Data.BindingExpression.Activate(Object item)
at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
at System.Windows.Data.BindingExpression.AttachOverride(DependencyObject target, DependencyProperty dp)
at System.Windows.StyleHelper.GetDataTriggerValue(UncommonField1 dataField, DependencyObject container, BindingBase binding) at System.Windows.StyleHelper.GetChildValueHelper(UncommonField1 dataField, ItemStructList1& valueLookupList, DependencyProperty dp, DependencyObject container, FrameworkObject child, Int32 childIndex, Boolean styleLookup, EffectiveValueEntry& entry, ValueLookupType& sourceType, FrameworkElementFactory templateRoot) at System.Windows.StyleHelper.DoTemplateInvalidations(FrameworkElement feContainer, FrameworkTemplate oldFrameworkTemplate) at System.Windows.Controls.Control.OnTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType) at System.Windows.StyleHelper.DoStyleInvalidations(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle) at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType) at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue) at System.Windows.TreeWalkHelper.InvalidateResourceReferences(DependencyObject d, ResourcesChangeInfo info) at System.Windows.TreeWalkHelper.OnResourcesChangedCallback(DependencyObject d, ResourcesChangeInfo info, Boolean visitedViaVisualTree) at System.Windows.Application.InvalidateResourceReferenceOnWindowCollection(WindowCollection wc, ResourcesChangeInfo info) at System.Windows.ResourceDictionary.NotifyOwners(ResourcesChangeInfo info) at System.Windows.ResourceDictionary.OnMergedDictionariesChanged(Object sender, NotifyCollectionChangedEventArgs e) at System.Collections.ObjectModel.ObservableCollection1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
at System.Windows.ThemeManager.AddOrUpdateThemeResources(ResourceDictionary rd, ResourceDictionary newDictionary)
at System.Windows.ThemeManager.OnSystemThemeChanged()
at System.Windows.SystemResources.SystemThemeFilterMessage(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)

2026-09-03.txt

✔️ Expected Behavior

No response

❌ Actual Behavior

No response

Upload Bug Report ZIP-file

No response

Additional Information

No response

Other Software

No response

[github-actions]

🧭 Triage summary

🙋 For the issue author

Lareina86, please review the following:

• Needed: Please attach the PowerToys bug report ZIP.
• Recommended: Please update PowerToys from 0.100.2 to the latest stable release, 0.101.2362.0, and confirm whether the issue still reproduces.

🛠️ For the PowerToys team

🧩 General · 🐞 Bug · 📦 PowerToys 0.100.2

WPF binding crash with NullReferenceException in BindingExpression.SetupDefaultValueConverter during theme changes. Bug report ZIP file not provided.

🔁 Possible duplicates

#42256 — Something went wrong

Why this may be a duplicate: Exact same NullReferenceException in BindingExpression.SetupDefaultValueConverter during binding initialization

#44991 — Bug report

Why this may be a duplicate: NullReferenceException in BindingExpression.SetupDefaultValueConverter during binding setup

#45219 — App Crash \- "System\.NullReferenceException: Object reference not set to an instance of an object\." after waking from sleep \(Windows 11\)

Why this may be a duplicate: Same NullReferenceException crash after waking from sleep with identical stack trace

#46873 — Crash due to NullReferenceException in SetupDefaultValueConverter\(\)

Why this may be a duplicate: Identical crash on wake from standby with same stack trace in SetupDefaultValueConverter

#47244 — Object reference not set to an instance of an object

Why this may be a duplicate: Identical NullReferenceException in BindingExpression.SetupDefaultValueConverter function

🧪 Investigation details

• Reproduction: ✅ Sufficient
• Bug report: ⚠️ Required for this failure type; not found

AI-assisted automated triage; PowerToys maintainers make final decisions.