readODS #211 Dataframe with nothing but spaces leads to an integer guessing error

[chainsawriot]

see ropensci/readODS#211

buggy <- structure(list(picture_archive_url = c("", "", "", "", ""), video_url = c(" ", 
" ", " ", " ", " ")), row.names = c(NA, -5L), class = "data.frame")

buggy
#>   picture_archive_url video_url
#> 1                              
#> 2                              
#> 3                              
#> 4                              
#> 5

minty::type_convert(buggy)
#> Error: basic_string::substr: __pos (which is 18446744073709551615) > this->size() (which is 1)

^{Created on 2025-01-04 with reprex v2.1.1}

V3 in the original error report does not contain spaces, so there is no error.

[chainsawriot]

To narrow it down even further

minty:::guess_parser(c(" "), trim_ws = TRUE)
#> Error: basic_string::substr: __pos (which is 18446744073709551615) > this->size() (which is 1)

^{Created on 2025-01-04 with reprex v2.1.1}

In fact, readr:::guess_parser does not have this problem because trim_ws is not implemented.