dmy() not failing (and returning incorrect date) on wrong date format

[brunj7]

Brief description of the problem

The function dmy() is not behaving the way I would expect on a messy dataset I have where 2 days were entered by mistake as 8&9 june 06. dmy() returns "2006-09-08" whereas as_date() is returning NA (like I would have expected).

library(lubridate)

dmy("8&9 june 06")
# [1] "2006-09-08"  <-- wrong!!

as_date("8&9 june 06")
# [1] NA  <-- What I would expect

Session Info:

─ Session info ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.3.3 (2024-02-29)
 os       macOS Sonoma 14.4.1
 system   aarch64, darwin20
 ui       RStudio
 language (EN)
 collate  en_US.UTF-8
 ctype    en_US.UTF-8
 tz       America/Los_Angeles
 date     2024-04-05
 rstudio  2023.12.1+402 Ocean Storm (desktop)
 pandoc   3.1.12.3 @ /opt/homebrew/bin/pandoc

─ Packages ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 package     * version date (UTC) lib source
 cachem        1.0.8   2023-05-01 [1] CRAN (R 4.3.0)
 cli           3.6.2   2023-12-11 [1] CRAN (R 4.3.1)
 devtools      2.4.5   2022-10-11 [1] CRAN (R 4.3.0)
 digest        0.6.35  2024-03-11 [1] CRAN (R 4.3.1)
 ellipsis      0.3.2   2021-04-29 [1] CRAN (R 4.3.0)
 fastmap       1.1.1   2023-02-24 [1] CRAN (R 4.3.0)
 fs            1.6.3   2023-07-20 [1] CRAN (R 4.3.0)
 generics      0.1.3   2022-07-05 [1] CRAN (R 4.3.0)
 glue          1.7.0   2024-01-09 [1] CRAN (R 4.3.1)
 htmltools     0.5.8.1 2024-04-04 [1] CRAN (R 4.3.1)
 htmlwidgets   1.6.4   2023-12-06 [1] CRAN (R 4.3.1)
 httpuv        1.6.15  2024-03-26 [1] CRAN (R 4.3.1)
 later         1.3.2   2023-12-06 [1] CRAN (R 4.3.1)
 lifecycle     1.0.4   2023-11-07 [1] CRAN (R 4.3.1)
 lubridate   * 1.9.3   2023-09-27 [1] CRAN (R 4.3.1)
 magrittr      2.0.3   2022-03-30 [1] CRAN (R 4.3.0)
 memoise       2.0.1   2021-11-26 [1] CRAN (R 4.3.0)
 mime          0.12    2021-09-28 [1] CRAN (R 4.3.0)
 miniUI        0.1.1.1 2018-05-18 [1] CRAN (R 4.3.0)
 pkgbuild      1.4.4   2024-03-17 [1] CRAN (R 4.3.1)
 pkgload       1.3.4   2024-01-16 [1] CRAN (R 4.3.1)
 profvis       0.3.8   2023-05-02 [1] CRAN (R 4.3.0)
 promises      1.2.1   2023-08-10 [1] CRAN (R 4.3.0)
 purrr         1.0.2   2023-08-10 [1] CRAN (R 4.3.0)
 R6            2.5.1   2021-08-19 [1] CRAN (R 4.3.0)
 Rcpp          1.0.12  2024-01-09 [1] CRAN (R 4.3.1)
 remotes       2.5.0   2024-03-17 [1] CRAN (R 4.3.1)
 rlang         1.1.3   2024-01-10 [1] CRAN (R 4.3.1)
 rstudioapi    0.16.0  2024-03-24 [1] CRAN (R 4.3.1)
 sessioninfo   1.2.2   2021-12-06 [1] CRAN (R 4.3.0)
 shiny         1.8.1.1 2024-04-02 [1] CRAN (R 4.3.1)
 stringi       1.8.3   2023-12-11 [1] CRAN (R 4.3.1)
 stringr       1.5.1   2023-11-14 [1] CRAN (R 4.3.1)
 timechange    0.3.0   2024-01-18 [1] CRAN (R 4.3.1)
 urlchecker    1.0.1   2021-11-30 [1] CRAN (R 4.3.0)
 usethis       2.2.3   2024-02-19 [1] CRAN (R 4.3.1)
 vctrs         0.6.5   2023-12-01 [1] CRAN (R 4.3.1)
 xtable        1.8-4   2019-04-21 [1] CRAN (R 4.3.0)

 [1] /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library

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