I am on an up-to-date Arch Linux system, using the GNOME desktop environment.
By default, this turns on bracketed paste in terminal emulators; for those not
familiar with this concept: it makes it so that if you paste in multiple lines
of code, they are received in a single chunk. This works just fine with R, up
to a certain amount of text: for chunks past a certain length, some amount of
text in the middle of the chunk goes missing. For example, if I print the
source of mgcv::gam into my R session and then attempt to copy and paste it
back in, what I end up with is:
<snip 53 perfectly good lines>
pmf$formula <- gp$pf
pmf <- eval(pmf, parent.frame())
} objectvironment(attr(object$pred.formula, "full")) <- .GlobalEnv<-
environment(object$terms) <- environment(object$pterms) <- .GlobalEnv
So:
- the first 55 lines in this example arrive perfectly fine
- then a bunch go completely missing
- then various parts of the last few lines are jumbled together into one line
For reference on the third point, the actual last 10 lines of my version of
mgcv::gam are:
if (is.null(object$deviance))
object$deviance <- sum(residuals(object, "deviance")^2)
names(object$gcv.ubre) <- method
environment(object$formula) <- environment(object$pred.formula) <-
environment(object$terms) <- environment(object$pterms) <- .GlobalEnv
if (!is.null(object$model))
environment(attr(object$model, "terms")) <- .GlobalEnv
if (!is.null(attr(object$pred.formula, "full")))
environment(attr(object$pred.formula, "full")) <- .GlobalEnv
object
}
parts of which can be recognized in the last line of what was pasted.
Naturally, the pasted function is not parsed properly: if I press return I get
the expected "+" signaling that the REPL is expecting more input. So it is not
merely a visual issue.
I can reproduce this both in GNOME Terminal and in xterm, so it is not a bug
specific to my terminal emulator. In addition, pasting the exact same code into
either vim or nano running within the same terminal works fine. So I believe
that this may be a bug in R itself. It's easy to work around by disabling
bracketed paste in the terminal, but it would be great if this could actually
be made to work, especially given that bracketed paste is the default on my
desktop environment.
If given an account, I would be happy to file this as a bug; let me know if
that is desired. In the meantime, have others run into this and perhaps
identified the root cause and/or a different workaround?
Thanks,
Cesko
sessionInfo():
R version 4.1.0 (2021-05-18)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Arch Linux
Matrix products: default
BLAS/LAPACK: /opt/intel/mkl/lib/intel64/libmkl_gf_lp64.so
locale:
[1] LC_CTYPE=nl_NL.UTF-8 LC_NUMERIC=C
[3] LC_TIME=nl_NL.UTF-8 LC_COLLATE=nl_NL.UTF-8
[5] LC_MONETARY=nl_NL.UTF-8 LC_MESSAGES=nl_NL.UTF-8
[7] LC_PAPER=nl_NL.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=nl_NL.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_4.1.0 Matrix_1.3-4 mgcv_1.8-36 splines_4.1.0
[5] nlme_3.1-152 grid_4.1.0 lattice_0.20-44
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