Ivan: thank you for your reply. I have now resolved this issue. I had an error with specifying an S4 implementation and its documentation. For debugging, I: (a) checked that a previous package version worked with a recent R development version; (b) used tools::codoc() to check the documentation (see the test-codoc task in $(RSRC)/tests/Makefile.common), using Ivan's suggested options() to recover from a warning; and (c) checked whether the S4 class had the available method.
Sincerely, Mark. ________________________________ From: Ivan Krylov <ikry...@disroot.org> Sent: 24 July 2025 22:07 To: Mark Clements <mark.cleme...@ki.se> Cc: r-package-devel@r-project.org <r-package-devel@r-project.org> Subject: Re: [R-pkg-devel] `Warning in formals(fun) : argument is not a function` � Thu, 24 Jul 2025 15:15:35 +0000 Mark Clements <mark.cleme...@ki.se> �����: > I am looking for guidance on how to debug a CRAN warning for a > package (rstpm2). The warning is: > > `Warning in formals(fun) : argument is not a function` Could you please provide some more information on where you encounter it and how it may be reproduced? I don't see it mentioned at <https://cran.r-project.org/web/checks/check_results_rstpm2.html<https://cran.r-project.org/web/checks/check_results_rstpm2.html>>, nor I see a recent incoming_pretest failure, but I do see some problems regarding constants being overwritten at <https://github.com/kalibera/cran-checks/tree/master/rcnst/results/rstpm2<https://github.com/kalibera/cran-checks/tree/master/rcnst/results/rstpm2>>. It's not impossible that the root cause of this warning is the same (although it's also plausible that it's different). > At package installation, this showed that some formals() were called > with objects of class derivedDefaultMethod -- however I am not > certain _which_ objects cause this issue. I think this is a red herring: a derivedDefaultMethod is a function and doesn't cause this warning by itself: getClass('derivedDefaultMethod') |> new(\(foo=bar) baz) |> formals() # $foo # bar > Does anyone have experience with debugging such warnings? If you can reproduce the warning, try doing so with options(warn = 2, error = recover) set. -- Best regards, Ivan Nar du skickar e-post till Karolinska Institutet (KI) innebar detta att KI kommer att behandla dina personuppgifter. Har finns information om hur KI behandlar personuppgifter<https://ki.se/om-ki/integritetsskyddspolicy>. Sending email to Karolinska Institutet (KI) will result in KI processing your personal data. You can read more about KI's processing of personal data here<https://staff.ki.se/data-protection-policy>. [[alternative HTML version deleted]]
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