match(<num>, <num>) fails on R 4.3.0.

[teunbrand]

I'm propagating this issue from tidyverse/ggplot2#5284

I'd expected that the code below would work similarly as it does for numeric classes.

x <- tibble::num(c(0.001, 0.005))

# Expected output
vctrs::vec_match(x, x)
#> [1] 1 2

# This bug
match(x, x)
#> Error in `as.character()`:
#> ! Can't convert `x` <pillar_num> to <character>.
#> Backtrace:
#>      ▆
#>   1. ├─base::match(x, x)
#>   2. │ ├─base::mtfrm(`<num>`)
#>   3. │ └─base::mtfrm.default(`<num>`)
#>   4. │   ├─base::as.character(x)
#>   5. │   └─vctrs:::as.character.vctrs_vctr(x)
#>   6. │     └─vctrs::vec_cast(x, character())
#>   7. └─vctrs (local) `<fn>`()
#>   8.   └─vctrs::vec_default_cast(...)
#>   9.     ├─base::withRestarts(...)
#>  10.     │ └─base (local) withOneRestart(expr, restarts[[1L]])
#>  11.     │   └─base (local) doWithOneRestart(return(expr), restart)
#>  12.     └─vctrs::stop_incompatible_cast(...)
#>  13.       └─vctrs::stop_incompatible_type(...)
#>  14.         └─vctrs:::stop_incompatible(...)
#>  15.           └─vctrs:::stop_vctrs(...)
#>  16.             └─rlang::abort(message, class = c(class, "vctrs_error"), ..., call = call)

^{Created on 2023-05-02 with reprex v2.0.2}

^{Created on 2023-05-02 with reprex v2.0.2}

I think the culprit is base::mtfrm.default which uses as.character() in the new R version, whereas it used as.vector() in older versions (e.g. 4.2.2).