complete_cases returns integer(0) if all cases and no cases are complete

[haugstve]

A minimal example:

A single NA value: All other indexes are returned, this is expected.
df1 <- tibble(a = rnorm(10), b = c(rnorm(5), NA, rnorm(4)), c = rnorm(10))
df1 %>% complete_cases()
[1] 1 2 3 4 5 7 8 9 10

Only NA values: Numeric(0) is returned, this is expected.
df2 <- tibble(a = rep(NA,10), b = rep(NA,10), c = rep(NA,10))
df2 %>% complete_cases()
integer(0)

No NA values: Numeric(0) is returned, all indexes where expected.
df3 <- tibble(a = rnorm(10), b = rnorm(10), c = rnorm(10))
df3 %>% complete_cases()
integer(0)

[strengejacke]

Fixed, will commit tonight.