NullReferenceException in XlMethodInfo.ConvertToXlMethodInfos

I'm getting a NullReferenceException on this line:
https://github.com/Excel-DNA/ExcelDna/blob/c1774862f489dd97ca0b2e85a9e5792a5df90702/Source/ExcelDna.Loader/XlMethodInfo.cs#L273

Up above mi is declared like `MethodInfo mi = methods?[i]; // List might be null` but the line I'm linking to seems to be assuming that `mi` is never null. I'm using ExcelDna.Registration and using lambda expressions to handle parameter conversions and this error seems to happen when I have a function where none of my lambda expressions can handle the given parameter type.

There's another `Logger.Registration` call a few lines before this that also should probably handle a null `mi`.