I don't find where this issue comes from, but seems the latest version of tibble causes this warning.
tibble::tibble(a = 1)
#> Warning: `...` is not empty.
#>
#> We detected these problematic arguments:
#> * `needs_dots`
#>
#> These dots only exist to allow future extensions and should be empty.
#> Did you misspecify an argument?
#> # A tibble: 1 x 1
#> a
#> <dbl>
#> 1 1
Created on 2020-07-10 by the reprex package (v0.3.0)
I don't find where this issue comes from, but seems the latest version of tibble causes this warning.
Created on 2020-07-10 by the reprex package (v0.3.0)