I have a data frame with list columns, that have been created via DBI... Those list columns are of type vctrs::list_of

I can't use that data frame with DT because I get an error when I try to. I've trimmed the issue down to a short function in the DT package.

Here is a reprex that reproduces the error:

val1 <- list("a", c("a", "b"))
out1 <- DT:::boxAtomicScalarElements(val1)
out1
#> [[1]]
#> [[1]][[1]]
#> [1] "a"
#> 
#> 
#> [[2]]
#> [1] "a" "b"
val2 <- vctrs::as_list_of(val1)
out2 <- DT:::boxAtomicScalarElements(val2)
#> Error in `lapply()`:
#> ! Can't convert `X[[i]]` <list> to <character>.

^{Created on 2025-11-14 with reprex v2.1.1}