Unquoted arguments fail with plug_split

[cimentadaj]

library(tidymodels) # for the rsample package, along with the rest of tidymodels
#> ── Attaching packages ────────────────────────────────────── tidymodels 0.1.0 ──
#> ✔ broom     0.5.6      ✔ recipes   0.1.12
#> ✔ dials     0.0.7      ✔ rsample   0.0.7 
#> ✔ dplyr     1.0.0      ✔ tibble    3.0.1 
#> ✔ ggplot2   3.3.2      ✔ tune      0.1.0 
#> ✔ infer     0.5.1      ✔ workflows 0.1.1 
#> ✔ parsnip   0.1.1      ✔ yardstick 0.0.6 
#> ✔ purrr     0.3.4
#> ── Conflicts ───────────────────────────────────────── tidymodels_conflicts() ──
#> ✖ purrr::discard() masks scales::discard()
#> ✖ dplyr::filter()  masks stats::filter()
#> ✖ dplyr::lag()     masks stats::lag()
#> ✖ recipes::step()  masks stats::step()
library(tidyflow)
#> 
#> Attaching package: 'tidyflow'
#> The following object is masked from 'package:tune':
#> 
#>     parameters
#> The following object is masked from 'package:dials':
#> 
#>     parameters
library(modeldata)  # for the cells data

data(cells, package = "modeldata")

rf_mod <- 
  rand_forest(trees = 1000) %>% 
  set_engine("ranger") %>% 
  set_mode("classification")

rf_fit <-
  cells %>%
  tidyflow(seed = 123) %>%
  plug_split(initial_split, strata = class) %>%
  plug_formula(class ~ .) %>% 
  plug_model(rf_mod) %>%
  fit()
#> Error: This tidyselect interface doesn't support predicates yet.
#> ℹ Contact the package author and suggest using `eval_select()`.