count function needs guard rails that name shouldn't be an existing column

[szimmer]

If you use the count function and set name to be one of the existing columns you are tabulating on, you get unexpected results. This should yield either an error or a note that the name had to be modified.

library(dplyr)
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union
mydat <- tibble(x=rep(c(1,2), 5))
mydat |>
  count(x)
#> # A tibble: 2 × 2
#>       x     n
#>   <dbl> <int>
#> 1     1     5
#> 2     2     5
mydat |>
  count(x, name="x")
#> # A tibble: 2 × 1
#>       x
#>   <int>
#> 1     5
#> 2     5

^{Created on 2025-11-20 with reprex v2.1.1}

Session info

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