rbindlist() crashing R session

```R
library(data.table)
# data.table 1.14.3 IN DEVELOPMENT built 2022-07-20 18:26:12 UTC

X = list(1, c(4.4, 3.5))
rbindlist(lapply(X, as.list), fill = TRUE, use.names = FALSE)
```

Crashes R (version 4.2.1) on Windows 10 both using Rstudio and a `-vanilla` session.