Re: [Rd] Crash/bug when calling match on latin1 strings
> Rui Barradas
> on Mon, 11 Oct 2021 07:41:51 +0100 writes:
> Hello,
> R 4.1.1 on Ubuntu 20.04.
> I can reproduce this error but not ~90% of the time, only the 1st time I
> run the script.
> If I run other (terminal) commands before rerunning the R script it
> sometimes segfaults again but once again very far from 90% of the time.
> rui@rui:~/tmp$ R -q -f rhelp.R
>> sessionInfo()
> R version 4.1.1 (2021-08-10)
> Platform: x86_64-pc-linux-gnu (64-bit)
> Running under: Ubuntu 20.04.3 LTS
> Matrix products: default
> BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
> LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0
> locale:
> [1] LC_CTYPE=pt_PT.UTF-8 LC_NUMERIC=C
> [3] LC_TIME=pt_PT.UTF-8LC_COLLATE=pt_PT.UTF-8
> [5] LC_MONETARY=pt_PT.UTF-8LC_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_4.1.1
>>
>> # A bunch of words in UTF8; replace *'s
>> words <- readLines("h://pastebin.c**/raw/MFCQfhpY", encoding =
> "UTF-8")
>> words2 <- iconv(words, "utf-8", "latin1")
>> gctorture(TRUE)
>> y <- match(words2, words2)
> *** caught segfault ***
> address 0x10, cause 'memory not mapped'
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> *** recursive gc invocation
> Traceback:
> 1: match(words2, words2)
> An irrecoverable exception occurred. R is aborting now ...
> Falta de segmentação (núcleo despejado)
> This last line is Portuguese for
> Segmentation fault (core dumped)
> Hope this helps,
Yes, it does, thank you!
I can confirm the problem: Only in R 4.1.0 and newer, and
including current "R-patched" and "R-devel" versions.
I've now turned this into a formal R bug report on R's bugzilla,
and (slightly) extended your (Travers') example into self
contained (no internet access) R script.
Bugzilla PR#18211 :" match() memory corruption "
https://bugs.r-project.org/show_bug.cgi?id=18211
with attachment 2929
--> https://bugs.r-project.org/attachment.cgi?id=2929=edit
==> please if possible follow up on bugzilla
Thanks again to you both!
Martin Maechler
> Rui Barradas
> Às 06:05 de 11/10/21, Travers Ching escreveu:
>> Here's a brief example:
>>
>> # A bunch of words in UTF8; replace *'s
>> words <- readLines("h://pastebin.c**/raw/MFCQfhpY", encoding =
"UTF-8")
>> words2 <- iconv(words, "utf-8", "latin1")
>> gctorture(TRUE)
>> y <- match(words2, words2)
>>
>>
>> I searched bugzilla but didn't see anything. Apologies if this is already
>> reported.
>>
>> The bug appears in both R-devel and the release, but doesn't seem to
affect
>> R 4.0.5.
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Re: [Rd] Crash/bug when calling match on latin1 strings
Hello,
R 4.1.1 on Ubuntu 20.04.
I can reproduce this error but not ~90% of the time, only the 1st time I
run the script.
If I run other (terminal) commands before rerunning the R script it
sometimes segfaults again but once again very far from 90% of the time.
rui@rui:~/tmp$ R -q -f rhelp.R
> sessionInfo()
R version 4.1.1 (2021-08-10)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 20.04.3 LTS
Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0
locale:
[1] LC_CTYPE=pt_PT.UTF-8 LC_NUMERIC=C
[3] LC_TIME=pt_PT.UTF-8LC_COLLATE=pt_PT.UTF-8
[5] LC_MONETARY=pt_PT.UTF-8LC_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_4.1.1
>
> # A bunch of words in UTF8; replace *'s
> words <- readLines("h://pastebin.c**/raw/MFCQfhpY", encoding =
"UTF-8")
> words2 <- iconv(words, "utf-8", "latin1")
> gctorture(TRUE)
> y <- match(words2, words2)
*** caught segfault ***
address 0x10, cause 'memory not mapped'
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
*** recursive gc invocation
Traceback:
1: match(words2, words2)
An irrecoverable exception occurred. R is aborting now ...
Falta de segmentação (núcleo despejado)
This last line is Portuguese for
Segmentation fault (core dumped)
Hope this helps,
Rui Barradas
Às 06:05 de 11/10/21, Travers Ching escreveu:
Here's a brief example:
# A bunch of words in UTF8; replace *'s
words <- readLines("h://pastebin.c**/raw/MFCQfhpY", encoding = "UTF-8")
words2 <- iconv(words, "utf-8", "latin1")
gctorture(TRUE)
y <- match(words2, words2)
I searched bugzilla but didn't see anything. Apologies if this is already
reported.
The bug appears in both R-devel and the release, but doesn't seem to affect
R 4.0.5.
[[alternative HTML version deleted]]
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[Rd] Crash/bug when calling match on latin1 strings
Here's a brief example:
# A bunch of words in UTF8; replace *'s
words <- readLines("h://pastebin.c**/raw/MFCQfhpY", encoding = "UTF-8")
words2 <- iconv(words, "utf-8", "latin1")
gctorture(TRUE)
y <- match(words2, words2)
I searched bugzilla but didn't see anything. Apologies if this is already
reported.
The bug appears in both R-devel and the release, but doesn't seem to affect
R 4.0.5.
[[alternative HTML version deleted]]
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R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
