I have gotten a crash right off the bat in console R (3.0.2, data.table 1.9.2) on Linux,
*** caught segfault *** address (nil), cause 'unknown' Traceback: 1: `[.data.table`(dt, , `:=`(forward_date, c(rep(NA, 5), date)), by = "strip") 2: dt[, `:=`(forward_date, c(rep(NA, 5), date)), by = "strip"] Possible actions: 1: abort (with core dump, if enabled) 2: normal R exit 3: exit R without saving workspace 4: exit R saving workspace Selection: 2 Save workspace image? [y/n/c]: n Warning message: In `[.data.table`(dt, , `:=`(forward_date, c(rep(NA, 5), date)), : RHS 1 is length 15 (greater than the size (10) of group 1). The last 5 element(s) will be discarded. It seems like this bug may be related, though three years old: https://r-forge.r-project.org/tracker/?group_id=240&atid=975&func=detail&aid=1664 Shir On Apr 22, 2014, at 2:18 PM, Kevin Ushey <[email protected]> wrote: > FWIW, I can reproduce this segfault within the console as well, > including with the latest SVN version of data.table 1.9.3. > > Running under R -d lldb, I don't get a segfault off the bat; I get: > >> dt[,forward_date:=c(rep(NA,5),date),by='strip'] > > Warning message: > > In `[.data.table`(dt, , `:=`(forward_date, c(rep(NA, 5), date)), : > RHS 1 is length 15 (greater than the size (10) of group 1). The last > 5 element(s) will be discarded. > > I also see the error, if I play around in the console a bit after launching R: > >> dt[,forward_date:=c(rep(NA,5),date),by='strip'] > > Process 55776 stopped > > * thread #1: tid = 0x13b169, 0x000000010002bf60 > libR.dylib`Rf_copyMostAttrib(inp=0x0000000101bb0f50, > ans=0x0000000101bb0ea8) + 192 at attrib.c:274, queue = > 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, > address=0x417e) > > frame #0: 0x000000010002bf60 > libR.dylib`Rf_copyMostAttrib(inp=0x0000000101bb0f50, > ans=0x0000000101bb0ea8) + 192 at attrib.c:274 > 271 PROTECT(ans); > 272 PROTECT(inp); > 273 for (s = ATTRIB(inp); s != R_NilValue; s = CDR(s)) { > -> 274 if ((TAG(s) != R_NamesSymbol) && > 275 (TAG(s) != R_DimSymbol) && > 276 (TAG(s) != R_DimNamesSymbol)) { > 277 installAttrib(ans, TAG(s), CAR(s)); > > Hopefully this gives a starting point in debugging... > > Kevin > > On Tue, Apr 22, 2014 at 11:07 AM, Zachary Long <[email protected]> wrote: >> Hello, >> >> I was wondering if an error like this had been addressed before. I am using >> data table 1.9.2. >> >> It appears that the error has to do with the interaction with R-Studio. When >> I run >> >> library(data.table) >> dt<-data.table(strip="Nov08",date=c("2006-08-01","2006-08-02","2006-08-03","2006-08-04","2006-08-07", >> >> "2006-08-08","2006-08-09","2006-08-10","2006-08-11","2006-08-14")) >> dt[,forward_date:=c(rep(NA,5),date),by='strip'] >> >> >> The result I expect is below, along with a warning message. >> >> strip date forward_date >> 1: Nov08 2006-08-01 NA >> 2: Nov08 2006-08-02 NA >> 3: Nov08 2006-08-03 NA >> 4: Nov08 2006-08-04 NA >> 5: Nov08 2006-08-07 NA >> 6: Nov08 2006-08-08 2006-08-01 >> 7: Nov08 2006-08-09 2006-08-02 >> 8: Nov08 2006-08-10 2006-08-03 >> 9: Nov08 2006-08-11 2006-08-04 >> 10: Nov08 2006-08-14 2006-08-07 >> >> >> However, I don't get this. >> >> 1 of two things can happen. >> >> 1. My R-Studio will completely crash without warning. All unsaved >> information is lost. >> 2. I can get "Error: Value of SET_STRING_ELT() must be a 'CHARSXP' not a >> 'character'" "In addition:Lost warning messages" >> >> Do you know what is the cause here? It seems related to memory allocation, >> or something under the hood relating to the interaction of R-Studio and data >> table. >> >> Zach >> >> _______________________________________________ >> datatable-help mailing list >> [email protected] >> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help > _______________________________________________ > datatable-help mailing list > [email protected] > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
