-----Original Message----- From: R-SIG-Debian [mailto:r-sig-debian-boun...@r-project.org] On Behalf Of Rolf Turner Sent: Thursday, 19 January 2017 10:11 AM To: Ian Erickson Cc: r-sig-debian@r-project.org Subject: Re: [R-sig-Debian] [FORGED] Taking determinant of a matrix of NAs results in intermittent memory corruption
>On 19/01/17 11:54, Ian Erickson wrote: >> Greetings; I've posted the following to R's bug tracking system (at >> https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17210 ) and Martin >> Maechler requested that I post to this list as well. >> If I start R from the command line with --vanilla, then repeatedly execute >> the following line: >> >> det(matrix(nrow=10,ncol=10)) >> >> ... I eventually get a crash, with error: >> >> *** Error in `/usr/lib/R/bin/exec/R': malloc(): memory corruption: >> 0x0000000002399400 *** >> >> Is anyone able to reproduce? > >I can't. I tried > >for(i in 1:100000) det(matrix(nrow=10,ncol=10)) I can. It's repeatable as well. CPU is Intel Xeon E5-2630v3 Ubuntu 14.04.5 LTS R from deb http://cran.r-project.org/bin/linux/ubuntu trusty/ R version 3.3.2 (2016-10-31) -- "Sincere Pumpkin Patch" Copyright (C) 2016 The R Foundation for Statistical Computing Platform: x86_64-pc-linux-gnu (64-bit) R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. Natural language support but running in an English locale R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > La_version() [1] "3.5.0" > system(paste("lsof -p", Sys.getpid(), "| grep -iE '(blas|lapack)'")) R 25596 kgore4 mem REG 8,4 39272 118292573 /usr/lib/R/modules/lapack.so R 25596 kgore4 mem REG 8,4 5882272 118096040 /usr/lib/lapack/liblapack.so.3.0 R 25596 kgore4 mem REG 8,4 23058832 118129172 /usr/lib/openblas-base/libblas.so.3 > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) *** Error in `/usr/lib/R/bin/exec/R': malloc(): memory corruption: 0x0000000001393090 *** Aborted (core dumped) It doesn't seem to matter what happens after the 4th execution it throws it out. Eg I just started mashing the keyboard Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) [1] NA > det(matrix(nrow=10,ncol=10)) [1] NA > sdfsdfjkjsdhfkjsdhfk*** Error in `/usr/lib/R/bin/exec/R': malloc(): memory > corruption: 0x00000000025c4090 *** Aborted (core dumped) _______________________________________________ R-SIG-Debian mailing list R-SIG-Debian@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-debian _______________________________________________ R-SIG-Debian mailing list R-SIG-Debian@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-debian
