Swift if statement with commas

If the if statement can take commas, what are the implications for else?

It seems to me that these two are equivalent:

 if let foo=bar, let x=y {
  // do stuff
 }
 if let foo=bar { if let x=y { /* do stuff */ }}

However the first usage does not allow for an else clause for the outer if-let, whereas the 2nd one does.

Isn't this programming practice therefore bad because it increases the chances of forgetting to handle non-happy-path cases?