>>>>> Laurent Gautier writes: > In case a search engine leads someone with the same issue here, I am > documenting the point I reached:
> I can reproduce the issue with a small example when forcing R to not load > any package at startup time (using an Renviron file): > ``` > package <- "utils" > lib.loc <- "<fill this according to your R install>" > ns <- loadNamespace(package, lib.loc) > ``` I cannot reproduce this using current R-devel or R-patched. After starting with R_DEFAULT_PACKAGES=NULL, R> search() [1] ".GlobalEnv" "Autoloads" "package:base" R> loadedNamespaces() [1] "compiler" "tools" "base" R> package <- "utils" R> lib.loc <- file.path(R.home(), "library") R> ns <- loadNamespace(package, lib.loc) R> loadedNamespaces() [1] "compiler" "tools" "utils" "base" -k > The code path goes through `registerS3methods(nsInfo$S3methods, package, > env)` and there to: > ``` > if (methods::is(genfun, "genericFunction")) > ``` > The evaluation of `methods::is` reaches the line triggering the error as > `.identC(class1, class2)` and `.identC(class2, "ANY")` both return `NA` and > `NA || NA` is not defined: > ``` >> if (NA || NA) { cat("here\n") } > Error in if (NA || NA) { : missing value where TRUE/FALSE needed > ``` > As I understand it `.identC()` should never return `NA`, and if the case > this would mean that R itself is an unstable state (something at the C > level that should not have happened has happened) but this was not caught > earlier. > [[alternative HTML version deleted]] > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel