Bug with indexing in list

[marcenavuc]

Hello, I was developing an R course on jupyter notebook and found a bug related to indexing in list.

When I run this code in jupyter notebook

a <- list(1:4, eee=3, a = 5:6)
a[c(T, F, F)]

the output is like this

$NA =
1 2 3 4

When I run this code in r prompt or r studio, output is

[[1]]
[1] 1 2 3 4

My sessionInfo in jupyter notebook

R version 4.0.2 (2020-06-22)
Platform: x86_64-conda_cos6-linux-gnu (64-bit)
Running under: Ubuntu 18.04.4 LTS

Matrix products: default
BLAS/LAPACK: /home/mark/anaconda3/envs/r-enviroment/lib/libopenblasp-r0.3.10.so

locale:
 [1] LC_CTYPE=ru_RU.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=ru_RU.UTF-8        LC_COLLATE=ru_RU.UTF-8    
 [5] LC_MONETARY=ru_RU.UTF-8    LC_MESSAGES=ru_RU.UTF-8   
 [7] LC_PAPER=ru_RU.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=ru_RU.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] compiler_4.0.2  ellipsis_0.3.1  IRdisplay_0.7.0 pbdZMQ_0.3-3   
 [5] tools_4.0.2     htmltools_0.5.0 pillar_1.4.6    base64enc_0.1-3
 [9] crayon_1.3.4    uuid_0.1-4      IRkernel_1.1.1  jsonlite_1.7.0 
[13] digest_0.6.25   lifecycle_0.2.0 repr_1.1.0      rlang_0.4.7    
[17] evaluate_0.14  

[flying-sheep]

What a weird object. You can recreate it via:

l <- list(1:4)
names(l) <- ''

Accessing its element via l[['']] or `$`(l, '') doesn’t work. It’s for all intents and purposes equal to list(1:4), except that identical(names(l), '').

[flying-sheep]

Fixed by 9af4e98