R script line numbers at error?

Question

If I am running a long R script from the command line (R --slave script.R), how can I get it to give line numbers at errors?

I don\'t want to add debug commands to

Answer 1

You do it by setting

options(show.error.locations = TRUE)

I just wonder why this setting is not a default in R? It should be, as it is in every other language.