1917 Code of Canon Law
On Ecclesiastical Burial - (Canon 1239. 2)
"Catechumens who, through no fault of their own, die without Baptism, are to be treated as baptized."
This doesn't prove they made it to heaven through BOD.
Let's remember what Christ told us in Scripture. "He who believes and is baptized shall be saved. He who does not believe, shall be condemned."
So, this means there are 3 categories of people:
1) Believes and is baptized (i.e. Catholic)
2) Believes and is not baptized (i.e. catechumen)
3) Does not believe (i.e. non-catholic)
Neither Christ, nor Scripture, nor the Church Fathers, nor any Church Council, nor any Pope has definitely told us where those people in group #2 go. It is clear that they aren't damned. It is also clear that they can't be saved. So, where do they go? Some say they go to Limbo.
This is why Fr Feeney said: "I don't know, and neither do you."