breakpoints(breaks=1) returns NA

[GreatEmerald]

Something to investigate: if I enter breaks=1, I get a result that says:

	 Optimal 1-segment partition: 

Call:
breakpoints.formula(formula = formula(response ~ trend + harmon), 
    h = 46, breaks = 1, data = bfastpp(bfts))

Breakpoints at observation number:
NA 

Corresponding to breakdates:
NA 

That is weird, because breaks = 1 means a 2-segment partition, not a 1-segment partition. breaks=2 works as expected.