Crash with binding path="/" in multibinding

[Kermalis]

Hello, I am having some issue that seems simple but I really cannot find any way to do it:
I have a list of MyEnum values, I have them in a ComboBox and have been using a converter to convert the MyEnum items to IBitmaps that are drawn for each ComboBox item.
Now I need to have another property of my object used as a parameter of the converter, so I looked to multiconverters, but I cannot find out how to plug in the values to the converter
The old way was:

<DataTemplate x:Key="Menu">
  <Image Source="{Binding Converter={x:Static infrastructure:MyConverter.Instance}, ConverterParameter=ExampleParam, Mode=OneWay}"/>
</DataTemplate>
.....
<ComboBox Items="{Binding MyObj.SelectableItems}" ItemTemplate="{StaticResource Menu}" SelectedItem="{Binding MyObj.MyEnumValue}"/>

From browsing Google, I came up with this:

<DataTemplate x:Key="Menu">
  <Image Stretch="None">
    <Image.Source>
      <MultiBinding Converter="{x:Static infrastructure:MyMultiConverter.Instance}" ConverterParameter="ExampleParam" Mode="OneWay">
        <Binding Path="SelectedItem" ElementName="MyOtherComboBox"/>
        <Binding Path="/"/> <!--This crashes-->
      </MultiBinding>
    </Image.Source>
  </Image>
</DataTemplate>

The Path="/" is apparently supposed to reference the current item in the iteration, like the regular bindings do, but it crashes instead. The crash is here: https://pastebin.com/raw/N29dzRaQ

Also, the converter is never called when I have Path="/", even when the items populate the ComboBox

I'm on 0.9.10

[Kermalis]

I can't test right now, but any chance this is fixed by #6246 ?

[Gillibald]

CurrentItem is used in the context of https://docs.microsoft.com/en-us/dotnet/api/system.windows.data.collectionview.currentitem?view=net-5.0 and that isn't available under Avalonia

Path="/" is a shortcut for CurrentItem

[maxkatz6]

TIL there is '/' in bindings.

[Kermalis]

Does any workaround exist? I couldn't find one so I left it as it was a year ago

[maxkatz6]

@Kermalis something like {Binding $parent[ComboBoxItem].DataContext} might help.