Exception when working with .rdlc file

[ghost]

VS2015 Pro Update 3 Relative Number v1.5.0 I thought it had to do with outlining, but I don't have solid reproducible scenario. Here are the exceptions:

659 2018/07/17 18:13:00.004 Error Editor or Editor Extension System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.Collections.Generic.List`1.get_Item(Int32 index) at RelativeNumber.RelativeNumber.ApplyNumbers() at RelativeNumber.RelativeNumber.OnCaretPositionChanged(Object sender, CaretPositionChangedEventArgs e) at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.RaiseEvent[TArgs](Object sender, EventHandler`1 eventHandlers, TArgs args) 660 2018/07/17 18:13:00.020 Error Editor or Editor Extension System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.Collections.Generic.List`1.get_Item(Int32 index) at RelativeNumber.RelativeNumber.ApplyNumbers() at RelativeNumber.RelativeNumber.OnLayoutChanged(Object sender, TextViewLayoutChangedEventArgs e) at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.RaiseEvent[TArgs](Object sender, EventHandler`1 eventHandlers, TArgs args) 661 2018/07/17 18:13:00.067 Error Editor or Editor Extension System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.Collections.Generic.List`1.get_Item(Int32 index) at RelativeNumber.RelativeNumber.ApplyNumbers() at RelativeNumber.RelativeNumber.OnLayoutChanged(Object sender, TextViewLayoutChangedEventArgs e) at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.RaiseEvent[TArgs](Object sender, EventHandler`1 eventHandlers, TArgs args) 662 2018/07/17 18:13:00.098 Error Editor or Editor Extension System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.Collections.Generic.List`1.get_Item(Int32 index) at RelativeNumber.RelativeNumber.ApplyNumbers() at RelativeNumber.RelativeNumber.OnLayoutChanged(Object sender, TextViewLayoutChangedEventArgs e) at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.RaiseEvent[TArgs](Object sender, EventHandler`1 eventHandlers, TArgs args)