safeframe warns when unlabelled columns are dropped

[Bisaloo]

We shouldn't see a warning when dist, an unlabelled column, is dropped in the following reprex:

library(safeframe)
#> 
#> Attaching package: 'safeframe'
#> The following object is masked from 'package:base':
#> 
#>     labels

x <- make_safeframe(cars,
  speed = "Miles per hour"
)

x[, "speed"]
#> Warning: The following labelled variables are lost:
#>  dist - NULL
#> 
#> // safeframe object
#>    speed
#> 1      4
#> 2      4
#> 3      7
#> 4      7
#> 5      8
#> 6      9
#> 7     10
#> 8     10
#> 9     10
#> 10    11
#> 11    11
#> 12    12
#> 13    12
#> 14    12
#> 15    12
#> 16    13
#> 17    13
#> 18    13
#> 19    13
#> 20    14
#> 21    14
#> 22    14
#> 23    14
#> 24    15
#> 25    15
#> 26    15
#> 27    16
#> 28    16
#> 29    17
#> 30    17
#> 31    17
#> 32    18
#> 33    18
#> 34    18
#> 35    18
#> 36    19
#> 37    19
#> 38    19
#> 39    20
#> 40    20
#> 41    20
#> 42    20
#> 43    20
#> 44    22
#> 45    23
#> 46    24
#> 47    24
#> 48    24
#> 49    24
#> 50    25
#> 
#> labelled variables:
#>  speed - Miles per hour

^{Created on 2024-12-03 with reprex v2.1.1}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.4.0 (2024-04-24)
#>  os       Ubuntu 24.04.1 LTS
#>  system   x86_64, linux-gnu
#>  ui       X11
#>  language en_US
#>  collate  en_GB.UTF-8
#>  ctype    en_GB.UTF-8
#>  tz       Europe/Paris
#>  date     2024-12-03
#>  pandoc   3.2 @ /usr/lib/rstudio/resources/app/bin/quarto/bin/tools/x86_64/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version date (UTC) lib source
#>  backports     1.5.0   2024-05-23 [1] CRAN (R 4.4.0)
#>  checkmate     2.3.2   2024-07-29 [1] CRAN (R 4.4.1)
#>  cli           3.6.3   2024-06-21 [1] CRAN (R 4.4.0)
#>  digest        0.6.37  2024-08-19 [1] CRAN (R 4.4.1)
#>  evaluate      1.0.1   2024-10-10 [1] CRAN (R 4.4.1)
#>  fastmap       1.2.0   2024-05-15 [1] CRAN (R 4.4.0)
#>  fs            1.6.5   2024-10-30 [1] CRAN (R 4.4.0)
#>  glue          1.8.0   2024-09-30 [1] CRAN (R 4.4.1)
#>  htmltools     0.5.8.1 2024-04-04 [1] CRAN (R 4.4.0)
#>  knitr         1.49    2024-11-08 [1] CRAN (R 4.4.0)
#>  lifecycle     1.0.4   2023-11-07 [1] CRAN (R 4.4.0)
#>  reprex        2.1.1   2024-07-06 [1] CRAN (R 4.4.0)
#>  rlang         1.1.4   2024-06-04 [1] CRAN (R 4.4.0)
#>  rmarkdown     2.29    2024-11-04 [1] CRAN (R 4.4.0)
#>  rstudioapi    0.17.1  2024-10-22 [1] CRAN (R 4.4.0)
#>  safeframe   * 0.0.1   2024-11-30 [1] Github (epiverse-trace/safeframe@7bf3f00)
#>  sessioninfo   1.2.2   2021-12-06 [1] CRAN (R 4.4.0)
#>  withr         3.0.2   2024-10-28 [1] CRAN (R 4.4.0)
#>  xfun          0.49    2024-10-31 [1] CRAN (R 4.4.0)
#>  yaml          2.3.10  2024-07-26 [1] CRAN (R 4.4.1)
#> 
#>  [1] /home/hugo/.local/share/R/x86_64-pc-linux-gnu-library/4.4
#>  [2] /opt/R/4.4.0/lib/R/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────

My assumption is that a show_null is TRUE when it should be FALSE but I don't have bandwidth to dig at this time.