Hi, Since yesterday I'm seeing `R CMD check --as-cran` failures on the R-devel daily build (specifically, R Under development (unstable) (2018-01-09 r74100)) for multiple packages:
* checking serialized R objects in the sources ... WARNING Found file(s) with version 3 serialization: ‘build/vignette.rds’ Such files are only readable in R >= 3.5.0. Recreate them with R < 3.5.0 or save(version = 2) or saveRDS(version = 2) as appropriate As far as I can tell, revision 74099 (https://github.com/wch/r-source/commit/d9530001046a582ff6a43ca834d6c3586abd0a97), which changes the default serialization format to 3, clashes with revision 73973 (https://github.com/wch/r-source/commit/885764eb74f2211a547b13727f2ecc5470c3dd00), which checks that serialized R objects are _not_ version 3. It seems that with the current development version of R, if you `R CMD build` and then run `R CMD check --as-cran` on the built package, it will fail. Neal ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel