Hi Brian, I don't have a windows machine, but on a modern macbook pro I'm not able to get this to crash in 3.5.1 or a very recent built-from-source R-devel. I increased the length of x by 2 orders of magnitude but that just made the loop take a lot longer to successfully run in both R versions i tested.
So seems like there is some OS/machine dependency at work here (?). Best, ~G On Wed, Feb 27, 2019 at 12:01 AM Brian Montgomery via R-devel < r-devel@r-project.org> wrote: > The following code crashes after about 300 iterations on > my x86_64-w64-mingw32 machine on R 3.5.2 --vanilla. > Others have duplicated this (see > https://github.com/tidyverse/magrittr/issues/190 if necessary), but I > don't know how machine/OS-dependent it may be. > If it doesn't crash for you, please try increasing the length of the x > vector. > > Substituting the commented-out line for the one below it works correctly > (prints out 1:1000 and ends normally) every time. > > x <- 1:200000 > y <- rep(letters[1:5], length(x) / 5L) > for (i in 1:1000) { > # x[y == 'a'] <- x[y == 'b'] > x <- `[<-`(x, y == 'a', x[y == 'b']) > cat(i, '') > } > cat('\n') > > The point of using this syntax is to make it work better with pipes, but > the errors occur without pipes or magrittr. > > Thank you for your help! > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
