> FWIW, here's the stack trace for the actual exception - an `IndexOutOfBoundsException`, as I suspected:
```
at System.String.get_Chars(Int32 index)
at Rubberduck.AutoComplete.Service.SelfClosingPairCompletionService.Execute(SelfClosingPair pair, CodeString original, Char input, CodeString& result) in C:\Dev\GitHub\Rubberduck\Rubberduck.Core\AutoComplete\Service\SelfClosingPairCompletionService.cs:line 30
at Rubberduck.AutoComplete.Service.SelfClosingPairHandler.HandleInternal(Au