schlather at math.uni-goettingen.de
2009-Dec-29 01:05 UTC
[Rd] different behaviour of NAs under valgrind (PR#14171)
Full_Name: Martin Schlather Version: 2.10.0 OS: linux 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 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
Prof Brian Ripley
2009-Dec-30 15:45 UTC
[Rd] different behaviour of NAs under valgrind (PR#14171)
On Tue, 29 Dec 2009, schlather at math.uni-goettingen.de wrote:> Full_Name: Martin Schlather > Version: 2.10.0Not current ....> OS: linuxNot 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 prodWhy 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 > > ______________________________________________ > 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