Inconsistent `NA`-handling between `separate_longer_delim()` and `separate_longer_position()`

[etiennebacher]

In the example below, I suppose separate_longer_position() should also return NA when the input is NA:

library(tidyr)
df <- data.frame(x = c("ab,cd", NA))

separate_longer_delim(df, x, delim = ",")
#>      x
#> 1   ab
#> 2   cd
#> 3 <NA>

separate_longer_position(df, x, width = 2)
#> Error in seq.default(1, max_length, by = width): 'to' must be a finite number

[Yousa-Mirage]

I agree with this.