I didn't see anything on this in the bug reports, and a search of the archives had lots of false positives when searching on "split" to be helpful.
I don't view this as particularly interesting or useful, but wanted to report it because I stumbled on it (and don't remember ever seeing "invalid permissions" as part of a segfault). Yes, I realize this is a silly example that you wouldn't actually do, but... there may be other more interesting cases with the same problem. The following was R-2.10.0 on Linux (with a Windows-64 2.11.0 difference to follow below): > data(iris) > split(1:nrow(iris), list(iris[,1], iris[,2])) *** caught segfault *** address 0x7fc806cd3d0c, cause 'invalid permissions' Traceback: 1: split.default(1:nrow(iris), list(iris[, 1], iris[, 2])) 2: split(1:nrow(iris), list(iris[, 1], iris[, 2])) Possible actions: 1: abort (with core dump, if enabled) 2: normal R exit 3: exit R without saving workspace 4: exit R saving workspace In contrast, R-2.11.0 in Windows-64: > data(iris) > split(1:nrow(iris), list(iris[,1], iris[,2])) Traceback: 1: split.default(1:nrow(iris), list(iris[, 1], iris[, 2])) 2: split(1:nrow(iris), list(iris[, 1], iris[, 2])) Error in split.default(1:nrow(iris), list(iris[, 1], iris[, 2])) : caught access violation - continue with care However, the same commands with drop=TRUE returns something, though the answers differ. In Linux: > a <- split(1:nrow(iris), list(iris[,1], iris[,2]), drop=TRUE) > length(a) [1] 116 And in Windows, differing only in the extra returned element, which I don't think should probably be part of the answer (there are no missing values in the iris data): > a <- split(1:nrow(iris), list(iris[,1], iris[,2]), drop=TRUE) > length(a) [1] 117 > a[117] $<NA> [1] 16 -- John W. Emerson (Jay) Associate Professor of Statistics Department of Statistics Yale University http://www.stat.yale.edu/~jay ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel