[Rd] Intermittent crashes with inset `[<-` command

[Tierney, Luke]

Fixed in R-devel and R-patched.

Best,

luke

On Wed, 27 Feb 2019, Tierney, Luke wrote:

> Thanks for the report. Should be fixed shortly.
>
> Best,
>
> luke
>
> On Tue, 26 Feb 2019, Brian Montgomery via R-devel 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 using r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>
>

-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
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