[R] No traceback available when using try(...)

[Thomas Lumley]

On Fri, 12 Mar 2004, Roger D. Peng wrote:

> Funny, it works for me on R-patched
>
>  > f <- function(a) { return(log(a)) }
>  > f("A")
> Error in log(x) : Non-numeric argument to mathematical function
>  > traceback()
> 2: log(a)
> 1: f("A")
>  > try(f("A"))
> Error in log(x) : Non-numeric argument to mathematical function
>  > traceback()
> 2: log(a)
> 1: f("A")
>

No, it doesn't.  The second traceback() call is printing the *previous*
trace information, which in this case is the same.

The bug in 1.8.1, which *is* fixed, is that you didn't get traceback
information anywhere, rather than not getting it with try()

	-thomas