From ripley at stats.ox.ac.uk  Sat Nov  8 17:45:11 2003
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Sat Nov  8 17:44:13 2003
Subject: [Rd] No traceback in r-patched
In-Reply-To: <3FAD1318.4060002@jhsph.edu>
Message-ID: <Pine.LNX.4.44.0311081618520.8306-100000@gannet.stats>

It is due to the addition to src/main/error.c:652

    if (traceback && ! oldInError) {
                  ^^^^^^^^^^^^^^^

so I think we need Luke's help.  By the time this is called inError has 
been saved twice, once as 0 and once as 1.  I suspect it should be inError
here rather than oldInError: one wants .Traceback created after error 
handling has almost finished.


On Sat, 8 Nov 2003, Roger D. Peng wrote:

> Since it's heading towards release, I thought I'd bring this up again. 
> I'm still not getting any traceback()'s in recent R-patched.  For 
> example, I get:
> 
>  > log("a")
> Error in log(x) : Non-numeric argument to mathematical function
>  > traceback()
> No traceback available
> 
> Or when running the examples in the traceback() help page:
> 
>  >      foo <- function(x) { print(1); bar(2) }
>  >      bar <- function(x) { x + a.variable.which.does.not.exist }
>  >      ## Don't run:
>  >      foo(2) # gives a strange error
> [1] 1
> Error in bar(2) : Object "a.variable.which.does.not.exist" not found
>  >      traceback()
> No traceback available
> 
> It seems the .Traceback variable is not being created.  If I'm doing 
> something incorrectly, I'd very much like to know.  I'm starting up with 
> R --vanilla.
> 
>  > version
>           _
> platform i686-pc-linux-gnu
> arch     i686
> os       linux-gnu
> system   i686, linux-gnu
> status   alpha
> major    1
> minor    8.1
> year     2003
> month    11
> day      07
> language R
>  > search()
> [1] ".GlobalEnv"      "package:methods" "package:ctest"   "package:mva"
> [5] "package:modreg"  "package:nls"     "package:ts"      "Autoloads"
> [9] "package:base"
>  >
> 
> 
> -roger
> 
> ______________________________________________
> R-devel@stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
> 
> 

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


[Rd] No traceback in r-patched
Prof Brian Ripley