[Rd] capture.output() duplicates last line unless newline (R-devel bug)
Henrik Bengtsson
henrik.bengtsson at ucsf.edu
Fri Aug 14 11:09:32 CEST 2015
In R-devel (2015-08-12 r69024), capture.output() incorrectly
duplicates the last line unless it ends with a newline. I don't see
this in R 3.2.2 RC (2015-08-13 r69049). It seems to have started
fairily recently; I spotted this yesterday after starting to get
errors in my R.utils check that use capture.output(), cf.
https://www.r-project.org/nosvn/R.check/r-devel-linux-x86_64-debian-clang/R.utils-00check.html
Examples:
> x <- "a"
> cat(x)
a>
> capture.output(cat(x))
[1] "a" "a"
> x <- "a\n"
> cat(x)
a
> capture.output(cat(x))
[1] "a"
> x <- "a\nb"
> cat(x)
a
b>
> capture.output(cat(x))
[1] "a" "b" "b"
> x <- "a\nb\n"
> cat(x)
a
b
> capture.output(cat(x))
[1] "a" "b"
> capture.output(cat(x))
[1] "a" "b"
> x <- c("a", "b")
> cat(x)
a b>
> capture.output(cat(x))
[1] "a b" "a b"
> x <- c("a", "b\n")
> cat(x)
a b
> capture.output(cat(x))
[1] "a b"
> sessionInfo()
R Under development (unstable) (2015-08-12 r69024)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] R.utils_2.1.0-9000 R.oo_1.19.0-9000 R.methodsS3_1.7.0-9000
loaded via a namespace (and not attached):
[1] tools_3.3.0
/Henrik
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