debugger() fails if "..." in function arguments

Dear all,

I'm having a problem with debugger() in both R 2.8.0 and R 2.12.0.
Probably also versions in-between.
But you are asked to report only on current R.
I don't see it logged in the bug database, but it's hard for me to
imagine that no-one else has encountered it.  So my question is whether
it's a known problem with a workaround, or do I log it as a new problem?
I doubt if almost anyone uses dump.frames() in R.  I think this is 
known, and the workaround is 'don't do that': use error=recover.
The situation is that if I use "options(error=dump.frames)" and then use
"debugger()", it fails if there's "..." in the function arguments.
Repro and version info below.

Thanks,
Charlie Roosen

myFunc <- function(a,b,...) {d <- a+b; stop("")}
options(error=dump.frames)
myFunc(1,2)
Error in myFunc(1, 2) :

debugger()
Message:  Error in myFunc(1, 2) :
Available environments had calls:
1: myFunc(1, 2)
2: stop("")

Enter an environment number, or 0 to exit  Selection: 1
Error in get(.obj, envir = dump[[.selection]]) :
 argument "..." is missing, with no default
That's easy to fix with a tryCatch() wrapper.  But the real problem is 
with last.dump(), and recover() has it to some extent:

options(error=recover)
myFunc(1,2,e=pi)
Error in myFunc(1, 2, e = pi) :

Enter a frame number, or 0 to exit

1: myFunc(1, 2, e = pi)

Selection: 1
Called from: top level
Browse[1]> e
Error during wrapup: object 'e' not found

If you know how, you can get to 'e' though ....

I am really not sure this is worth changing.

version
              _
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          12.0
year           2010
month          10
day            15
svn rev        53317
language       R
version.string R version 2.12.0 (2010-10-15)

Charles Roosen, PhD
Technical Director

T: +41 (0)61 206 92 91
M: +41 (0)79 248 70 71
F: +41 (0) 61 206 92 99

www.mango-solutions.com

Mango Solutions AG
Aeschenvorstadt 36
4051 Basel
Switzerland

image002

LEGAL NOTICE
This message is intended for the use o...{{dropped:10}}

______________________________________________
R-devel at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

Brian D. Ripley,                  ripley at 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

debugger() fails if "..." in function arguments

Thread (2 messages)