[Rd] bug (or feature) in alpha 2.13?

[Norm Matloff]

The pattern (I can make a simple example if needed):

   > source("x.R")
   > options(error=recover)
   > x <- ...
   > f(x)  # f() from x.R 
      (subscript bounds error, now in recover())
   Selection: 1
   Browse[1]> where

In the output from "where," there should be information on the line
number at which the user code blew up.  It's there in 2.12, but not in
2.13, from what I can see.

Norm Matloff