Note: I posted this on Nabble before, but it keeps telling me that it has not been accepted by the mailing list. So this might be a duplicate.<div><br></div><div><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">Hi together, </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">I recently encountered severe problems with R (see my post on stackoverflow here: </span><a href="http://stackoverflow.com/questions/8616862/r-terminates-with-error-message-this-application-has-requested-the-runtime-to-t" target="_top" rel="nofollow" link="external" style="font-size:13px;color:rgb(85,26,139);font-family:'Open Sans';background-color:rgb(255,255,255)">http://stackoverflow.com/questions/8616862/r-terminates-with-error-message-this-application-has-requested-the-runtime-to-t</a><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">). Spending the whole day digging further into the problem, I was able to produce rather minimal code that crashes my RStudio session. I confirmed this on two different machines (see details at the end). If I run this code in my Linux Terminal, I get the following error:</span></div>
<div><br></div><div><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> *** caught segfault *** </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">address (nil), cause 'unknown' </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">Traceback: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> 1: as.data.frame.Date(x[[i]], optional = TRUE) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> 2: as.data.frame(x[[i]], optional = TRUE) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> 3: data.frame(ID = rep(1:100, each = n/100), intTime = rep(1:(n/100), times = 100), FYE = lDate1 + 1:n) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">So it looks like a similar problem to caneff's problem: </span><a href="http://r.789695.n4.nabble.com/Random-segfaults-td4195472i20.html" target="_top" rel="nofollow" link="external" style="font-size:13px;color:rgb(85,26,139);font-family:'Open Sans';background-color:rgb(255,255,255)">http://r.789695.n4.nabble.com/Random-segfaults-td4195472i20.html</a><br>
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">So my two questions are: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">1. Can you confirm this? (Sometimes, I have to run the code a couple of times to get R to crash) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">2. What is the cause? (Interestingly, I need to add the line DT[, reportDate := NA] to get the code breaking, although this line seems completely irrelevant for the further computations. For me, R closes when the last line is run.) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">Rather minimal code: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">get_diff_month <- function(actualDate, baseDate) { </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> #Because data.table also has a month function </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> return(month(actualDate) - month(baseDate) + 12*(year(actualDate) - year(baseDate))) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">} </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">library(data.table) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">n <- 100000 </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">lDate1 <- as.Date("1jan1900", "%d%b%Y")#dmy("1Jan1900") </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">lDate2 <- as.Date("1jan1901", "%d%b%Y")#dmy("1Jan1901") </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">df <- data.frame(ID = rep(1:100, each=n/100), </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> intTime = rep(1:(n/100), times=100), </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> FYE=lDate1 + 1:n) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">DT <- as.data.table(df) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">DT[rbinom(n, size=1, prob=0.05)==1, FYE:=NA] </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">DT[, reportDate := NA] #Bad line: comment it out and nothing breaks! </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">DT[, intFYE := get_diff_month(FYE, as.Date("1jan1900", "%d%b%Y"))] </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">intDT <- DT[ , list(FYE, intTime, ID)] </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">newDates <- intDT[, intTime] - 1 </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">intDT[, intTime := newDates] </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">#Set keys </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">key(DT) <- c("ID", "intTime") </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">key(intDT) <- c("ID", "intTime") </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">DT <- merge(DT, intDT, all.x=TRUE) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">DT[, intFYE_Next := get_diff_month(FYE.y, as.Date("1jan1900", "%d%b%Y"))] </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">sessionInfo() 1: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">R version 2.13.2 (2011-09-30) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">Platform: x86_64-pc-linux-gnu (64-bit) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">locale: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 LC_MONETARY=C </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"> [6] LC_MESSAGES=en_US.UTF-8 LC_PAPER=en_US.UTF-8 LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">attached base packages: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] stats graphics grDevices utils datasets methods base </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">other attached packages: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] data.table_1.7.7 </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">loaded via a namespace (and not attached): </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] tools_2.13.2 </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">sessionInfo() 2: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">R version 2.14.0 (2011-10-31) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">Platform: x86_64-pc-mingw32/x64 (64-bit) </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">locale: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] C </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">attached base packages: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] stats graphics grDevices utils datasets methods base </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">other attached packages: </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] data.table_1.7.7 </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">loaded via a namespace (and not attached): </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">[1] tools_2.14.0 </span><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)"><br style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">
<span style="font-family:'Open Sans';font-size:13px;background-color:rgb(255,255,255)">Thanks Christoph</span><br clear="all"><div><br></div>-- <br>--------------------------------------------------------------------------------------------------------------------------------------------------------------------<br>
<br>Christoph Jäckel (Dipl.-Kfm.)<br><br>--------------------------------------------------------------------------------------------------------------------------------------------------------------------<br><br>Research Assistant<br>
<br>Chair for Financial Management and Capital Markets | Lehrstuhl für Finanzmanagement und Kapitalmärkte<br><br>TUM School of Management | Technische Universität München<br><br>Arcisstr. 21 | D-80333 München | Germany<br>
<br>Mailto: <a href="mailto:christoph.jaeckel@wi.tum.de" target="_blank">christoph.jaeckel@wi.tum.de</a> | Web: <a href="http://www.fm.wi.tum.de" target="_blank">www.fm.wi.tum.de</a><br><br>Phone: +49 89 289 25487 | Fax: +49 89 289 25488<br>
<br> <br><br>Head of Chair:<br><br>Univ.-Prof. Dr. Christoph Kaserer<br><br>----------------------------------------------------------------------------------------------------------------------------------------------------------------------<br>
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