On Tue, 29 Dec 2009, schlat...@math.uni-goettingen.de wrote:
Full_Name: Martin Schlather
Version: 2.10.0
Not current ....
OS: linux
Not really specific enough to be helpful: these things depend on the
compiler and libc.
Submission from: (NULL) (91.3.220.231)
Bug summary:
some functions behave differently for NAs when
valgrind is used in R, e.g. sum and prod
Why is that something to be reported to R-bugs?
For me (with the current valgrind 3.5.0 on i686 Fedora 12) exactly the
same compiled code gives different results when run natively and under
valgrind. That looks very like a bug in valgrind's runtime, and it is
incomprehensible as to why you assign blame to R.
Bug demonstration:
--- without valgrind ----
sum(c(NA,1)[1])
[1] NA
--- with valgrind ----
sum(c(NA,1)[1])
[1] NaN
R call with valgrind:
R -d "valgrind --tool=memcheck --memcheck:leak-check=yes --num-callers=20 "
using
valgrind-3.3.0
platform = i686-pc-linux-gnu
arch = i686
os = linux-gnu
system = i686, linux-gnu
status =
major = 2
minor = 10.0
year = 2009
month = 10
day = 26
svn rev = 50208
language = R
version.string = R version 2.10.0 (2009-10-26)
Locale:
LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=C;LC_TIME=en_GB.UTF-8;LC_COLLATE=en_GB.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=C
Search Path:
.GlobalEnv, package:stats, package:graphics, package:grDevices, package:utils,
package:datasets, package:methods, Autoloads, package:base
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--
Brian D. Ripley, rip...@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
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