Hello,
I can also reproduce this, R 3.5.2 on Ubuntu 18.04 LTS.
First run gives error after 148.
After 148:
Error in `[<-`(x, y == "a", x[y == "b"]) :
substituto tem comprimento zero
Execução interrompida
Translation:
replacement has length zero
Execution stopped
Second run gives a different error, I changed the script to start with a
sessionInfo() instruction, everything else is the same as in the OP.
After 180:
*** caught segfault ***
address 0x700000002, cause 'memory not mapped'
An irrecoverable exception occurred. R is aborting now ...
Several runs with or without the sessionInfo() always give the two
different errors above.
The sessionInfo() was the following.
sessionInfo()
R version 3.5.2 (2018-12-20)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 18.04.1 LTS
Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.7.1
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.7.1
locale:
[1] LC_CTYPE=pt_PT.UTF-8 LC_NUMERIC=C
[3] LC_TIME=pt_PT.UTF-8 LC_COLLATE=pt_PT.UTF-8
[5] LC_MONETARY=pt_PT.UTF-8 LC_MESSAGES=pt_PT.UTF-8
[7] LC_PAPER=pt_PT.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=pt_PT.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_3.5.2
Hope this helps,
Rui Barradas
Às 08:46 de 27/02/2019, Serguei Sokol escreveu:
On 26/02/2019 05:18, 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.
It crashes too on my Mageia6 (RPM based Linux distribution):
184 185 186 187
*** caught segfault ***
address 0x700000002, cause 'memory not mapped'
Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace
The crash can happen at different moments, sometimes after i=187 like in
the example above, sometimes after i=915. The error is not always
segfault. It can also be
915 Error in `[<-`(x, y == "a", x[y == "b"]) : replacement has length zero
or
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Error in
`[<-`(x, y == "a", x[y == "b"]) :
types (de raw a integer) incompatibles dans l'ajustement
d'affectation de type
(sorry, this crash was in french locale)
Hoping this helps.
Serguei.
> sessionInfo()
R version 3.5.2 (2018-12-20)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Mageia 6
Matrix products: default
BLAS/LAPACK: /home/opt/OpenBLAS/lib/libopenblas_sandybridge-r0.3.3.so
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_3.5.2
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!
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