Hello,
I'm testing some code in R 4.0, and I'm having an issue with the following" # ------------- rm(list=ls()) graphics.off() #load("/tmp/post.RData") var = list(); # If I uncomment this it fixes things: # var$options = list(mi = list(), # misc = list()) # var$options$misc$abc = "123" var$options$mi$something = 13 #------------ This is a stripped down example but it exhibits the issue I"m having. Basically when I create the list element var$options$mi the contents of var$options$misc move over to var$options$mi. And what was in var$options$misc become NULL: So now var$options looks like: var$options $misc $misc$abc NULL $mi $mi$abc [1] "123" $mi$something [1] 13 This worked (still works) in R 3.5.1. I understand partial matching, but is this normal lists moving over to elements like this? I can uncomment the text mentioned in the example and it seems to fix it, but I'm wondering if this is a bug or just my poor programming coming back to bite me. I've included my sessionInfo() at the bottom. Thanks John :wq sessionInfo() R version 4.0.0 (2020-04-24) Platform: x86_64-apple-darwin17.0 (64-bit) Running under: macOS Mojave 10.14.5 Matrix products: default BLAS: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRblas.dylib LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] gdata_2.18.0 ggplot2_3.3.0 deSolve_1.28 loaded via a namespace (and not attached): [1] Rcpp_1.0.4.6 gtools_3.8.2 withr_2.2.0 assertthat_0.2.1 [5] dplyr_0.8.5 digest_0.6.25 crayon_1.3.4 grid_4.0.0 [9] R6_2.4.1 lifecycle_0.2.0 gtable_0.3.0 magrittr_1.5 [13] scales_1.1.1 pillar_1.4.4 rlang_0.4.6 vctrs_0.3.0 [17] ellipsis_0.3.1 glue_1.4.1 purrr_0.3.4 munsell_0.5.0 [21] compiler_4.0.0 pkgconfig_2.0.3 colorspace_1.4-1 tidyselect_1.1.0 [25] tibble_3.0.1 [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.