Can an interrupted long rest be treated as a short rest?

[RSP]

As written in the PHB a long rest is 8 hours of rest, of which two can be standing watch. It can be interrupted by 1 hour of walking, but that hour is not part of the rest time. So 4 hours of rest interrupted by 1 hour of walking followed by 4 hours of rest would be a long rest. 4 hours of rest interrupted by 1 hour of walking followed by 3 hours of rest would be a short rest.

I think Leon was referring to the PHB errata that states a LR requires 6 hours of sleep. Per the errata:

"A long rest is a period of extended downtime, at least 8 hours long, during which a character sleeps for at least 6 hours and performs no more than 2 hours of light activity, such as read- ing, talking, eating, or standing watch.”