mutate(index = row_number()) fails on an empty frame (version 0.3.0.2)

[sbisaacson]

The command

mutate(frame, index = row_number())

fails if nrow(frame) == 0:

mutate(data.frame(a = numeric(0)), index = row_number())
## Error: upper value must be greater than lower value
mutate(data.frame(a = 1), index = row_number())
##   a index
## 1 1     1

[romainfrancois]

Should be fixed now in the dev_0_4_0 branch.

[sbisaacson]

Thank you for fixing this.