R devel - Mar 2025 - Suppressed "graphical parameter" warnings reviving themselves magically

What's going on here?

$ R --vanilla --quiet
> plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
> NULL
NULL
Warning messages:
1: "foo" is not a graphical parameter
2: "foo" is not a graphical parameter

Note how the warnings are revived in that second "NULL" call.  I can
reproduce this in R 4.4.3 and R-devel (2025-03-19 r88003). This might
be specific to "graphical parameter" warnings, because it won't
happen
with, say, suppressWarnings({ log(-1) }).

It also doesn't appear if I call split up the first call into to
different REPL calls;

$ R --vanilla --quiet
> plot.new()
> suppressWarnings({ points(0, 0, foo = TRUE) })
> NULL
NULL

/Henrik

PS. I thought I had sent this many months ago, but I just now found
this message in my draft folder, so now I'm not sure. Sorry, if this
is a duplicate.

I don't know what's going on, but I see a version of it in R 4.4.2 on 
MacOS in the console, but not in R.app.

The difference is I only get one of the warnings, and only on the first 
attempt:
> $ R
> 
> R version 4.4.2 (2024-10-31) -- "Pile of Leaves"
> Copyright (C) 2024 The R Foundation for Statistical Computing
> Platform: aarch64-apple-darwin20
> 
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
> 
>   Natural language support but running in an English locale
> 
> R is a collaborative project with many contributors.
> Type 'contributors()' for more information and
> 'citation()' on how to cite R or R packages in publications.
> 
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
> 
>> plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
> Warning message:
> "foo" is not a graphical parameter 
>> plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
In R.app I don't seem to see it at all.

Duncan Murdoch



On 2025-03-21 1:51 a.m., Henrik Bengtsson wrote:
> What's going on here?
> 
> $ R --vanilla --quiet
>> plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
> Warning messages:
> 1: "foo" is not a graphical parameter
> 2: "foo" is not a graphical parameter
> 
> Note how the warnings are revived in that second "NULL" call.  I
can
> reproduce this in R 4.4.3 and R-devel (2025-03-19 r88003). This might
> be specific to "graphical parameter" warnings, because it
won't happen
> with, say, suppressWarnings({ log(-1) }).
> 
> It also doesn't appear if I call split up the first call into to
> different REPL calls;
> 
> $ R --vanilla --quiet
>> plot.new()
>> suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
> 
> /Henrik
> 
> PS. I thought I had sent this many months ago, but I just now found
> this message in my draft folder, so now I'm not sure. Sorry, if this
> is a duplicate.
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

?s 05:51 de 21/03/2025, Henrik Bengtsson escreveu:
> What's going on here?
> 
> $ R --vanilla --quiet
>> plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
> Warning messages:
> 1: "foo" is not a graphical parameter
> 2: "foo" is not a graphical parameter
> 
> Note how the warnings are revived in that second "NULL" call.  I
can
> reproduce this in R 4.4.3 and R-devel (2025-03-19 r88003). This might
> be specific to "graphical parameter" warnings, because it
won't happen
> with, say, suppressWarnings({ log(-1) }).
> 
> It also doesn't appear if I call split up the first call into to
> different REPL calls;
> 
> $ R --vanilla --quiet
>> plot.new()
>> suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
> 
> /Henrik
> 
> PS. I thought I had sent this many months ago, but I just now found
> this message in my draft folder, so now I'm not sure. Sorry, if this
> is a duplicate.
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
Hello,

I cannot reproduce this on Windows 11, R 4.4.3.
The command below is not exactly the same but I have tried it with the 
command in the OP and got the same result.



$ R --vanilla --quiet -f "rdevel.R" > ./Temp/rdevel.txt
 > plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
 > NULL
NULL
 > sessionInfo()
R version 4.4.3 (2025-02-28 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows 11 x64 (build 22631)

Matrix products: default


locale:
[1] LC_COLLATE=Portuguese_Portugal.utf8 
LC_CTYPE=Portuguese_Portugal.utf8
[3] LC_MONETARY=Portuguese_Portugal.utf8 LC_NUMERIC=C 

[5] LC_TIME=Portuguese_Portugal.utf8

time zone: Europe/Lisbon
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

loaded via a namespace (and not attached):
[1] compiler_4.4.3
 >



Hope this helps,

Rui Barradas


-- 
Este e-mail foi analisado pelo software antiv?rus AVG para verificar a presen?a
de v?rus.
www.avg.com

Warnings are not "reviving themselves magically". Try resizing the
window a few times and hitting return in the REPL. That should give
you a hint on what is going on.

Best,

luke

On Fri, 21 Mar 2025, Henrik Bengtsson wrote:
> What's going on here?
>
> $ R --vanilla --quiet
>> plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
> Warning messages:
> 1: "foo" is not a graphical parameter
> 2: "foo" is not a graphical parameter
>
> Note how the warnings are revived in that second "NULL" call.  I
can
> reproduce this in R 4.4.3 and R-devel (2025-03-19 r88003). This might
> be specific to "graphical parameter" warnings, because it
won't happen
> with, say, suppressWarnings({ log(-1) }).
>
> It also doesn't appear if I call split up the first call into to
> different REPL calls;
>
> $ R --vanilla --quiet
>> plot.new()
>> suppressWarnings({ points(0, 0, foo = TRUE) })
>> NULL
> NULL
>
> /Henrik
>
> PS. I thought I had sent this many months ago, but I just now found
> this message in my draft folder, so now I'm not sure. Sorry, if this
> is a duplicate.
>
> ______________________________________________
> R-devel at 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
241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu/