[R] browser() misbehavior ?

[John Fox]

Dear Bill,

Your example works fine for me with R 1.6.2 under Windows 2000. The 
behaviour that you report should occur if you press RETURN at the browser 
prompt, but that seems unlikely.

John

At 02:07 PM 1/29/2003 -0500, Pikounis, Bill wrote:
>Under v1.6.2, Windows NT4 OS, when a function contains an execution error
>and I have placed browser() in inside the function body, the call to browser
>is ignored.  A brief example to illustrate:
>
> > foo <- function(x) {
>+   y <- x ^ 2
>+   browser()
>+   foo2(x)  ## Intentional error
>+   x ^ 3
>+ }
> >
>
> > foo(30)
>Called from: foo(30)
>Browse[1]>
>Error in foo(30) : couldn't find function "foo2"
>
>## browser() still seems to be ignored even if a function has no execution
>error
>
> > traceback()
>1: foo(30)
>
>Has anyone else experienced this?  I am using v1.6.2 on Windows NT 4.
>
>Under Linux i686 (Mandrake 9.0), the same example works as expected;
>execution is stopped and I can usefully browser() as it is designed.
>
>As always, any advice is welcome.
>
>Thanks,
>Bill
>
>----------------------------------------
>Bill Pikounis, Ph.D.
>Biometrics Research Department
>Merck Research Laboratories
>PO Box 2000, MailDrop RY84-16
>126 E. Lincoln Avenue
>Rahway, New Jersey 07065-0900
>USA
>
>v_bill_pikounis at merck.com
>
>Phone: 732 594 3913
>Fax: 732 594 1565
>
>
>
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____________________________
John Fox
Department of Sociology
McMaster University
email: jfox at mcmaster.ca
web: http://www.socsci.mcmaster.ca/jfox