[R-pkg-devel] Warning on r-oldrel-macos-x86_64

[Helmut Schütz]

Dear all,

we faced a warning on r-oldrel-macos-x86_64:
https://cran.r-project.org/web/checks/check_results_PowerTOST.html
I'm not concerned about "Pandoc (>= 1.12.3) and/or pandoc-citeproc not 
available" in the first 5 vignettes since there were no problem in the 
previous releases.
However I found this on stackoverflow:
https://stackoverflow.com/questions/50789125/how-to-get-an-rmarkdown-vignette-for-r-package-to-escape-cran-warnings-on-solari
RolandAsc commented:
"In my understanding you can only see this warning if there is an error 
(either because warnings are being converted to errors or because there 
is another subsequent error), else it just doesn't come through. This is 
not an answer but maybe an explanation."
Seems to be correct. In my code a data.frame is assigned with a column 
"foo" and _without_ stringsAsFactors = FALSE. Later a function is called 
which requires "foo" as character.
The default stringsAsFactors was changed to FALSE in R4.0.0. Hence, my 
question: How "old" is the old releaseon CRAN's test machines/ macos? 
oldrel on windows is OK.

What shall we do?
Re-submit with the same release-number(either add stringsAsFactors = 
FALSE or call the function with as.character("foo")with an explanation?

Helmut

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