unnest() on list with factor does not work after upgrading to 0.8.0

[erblast]

thanks for the great tidyverse packages. I recently ran into a problem after upgrading R to 3.4.4 and subsequently tidyr to 0.8.0 and tibble to 1.4.2. I am posting the issue here because I get the error when trying to use unnest()

this does not work anymore -----------------------------------------------------------------------------

require(tidyr)
require(tibble)

vec_num = c( 1, 2, 3)

vec_fac = as.factor( vec_num )

tib = tibble( v = list( vec_num ) )
unnest( tib, v )

tib = tibble( v = list( vec_fac ) ) 
unnest( tib, v )

sessionInfo()

R version 3.4.4 (2018-03-15)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United States.1252    

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

other attached packages:
[1] tibble_1.4.2 tidyr_0.8.0 

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.16     utf8_1.1.3       crayon_1.3.4     dplyr_0.7.4      assertthat_0.2.0 R6_2.2.2         magrittr_1.5     pillar_1.2.1    
 [9] cli_1.0.0        rlang_0.2.0      rstudioapi_0.7   bindrcpp_0.2     tools_3.4.4      glue_1.2.0       purrr_0.2.4      yaml_2.1.18     
[17] compiler_3.4.4   pkgconfig_2.0.1  bindr_0.1.1      tidyselect_0.2.4

but used to work with this configuration ----------------------------------------------------------------------

R version 3.4.3 (2017-11-30)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 16299)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

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

other attached packages:
[1] forcats_0.2.0      stringr_1.2.0      dplyr_0.7.4        purrr_0.2.4        readr_1.1.1       
[6] tidyr_0.7.2        tibble_1.3.4       ggplot2_2.2.1.9000 tidyverse_1.2.1   

loaded via a namespace (and not attached):
[1] Rcpp_0.12.14      cellranger_1.1.0  compiler_3.4.3    plyr_1.8.4        bindr_0.1         tools_3.4.3      
[7] lubridate_1.7.1   jsonlite_1.5      nlme_3.1-131      gtable_0.2.0      lattice_0.20-35   pkgconfig_2.0.1  
[13] rlang_0.1.4       psych_1.7.8       cli_1.0.0         rstudioapi_0.7    parallel_3.4.3    haven_1.1.0      
[19] bindrcpp_0.2      xml2_1.1.1        httr_1.3.1        hms_0.4.0         grid_3.4.3        glue_1.2.0       
[25] R6_2.2.2          readxl_1.0.0      foreign_0.8-69    modelr_0.1.1      reshape2_1.4.3    magrittr_1.5     
[31] scales_0.5.0.9000 rvest_0.3.2       assertthat_0.2.0  mnormt_1.5-5      colorspace_1.3-2  stringi_1.1.6    
[37] lazyeval_0.2.1    munsell_0.4.3     broom_0.4.3       crayon_1.3.4     

[cderv]

It has been reported in #407 and already been fixed (see NEWS)

It is working on last dev version

library(tidyr)
packageVersion("tidyr")
#> [1] '0.8.0.9000'
library(tibble)
packageVersion("tibble")
#> [1] '1.4.2'

vec_num <- c(1, 2, 3)

vec_fac <- as.factor(vec_num)

tib <- tibble(v = list(vec_num))
unnest(tib, v)
#> # A tibble: 3 x 1
#>       v
#>   <dbl>
#> 1    1.
#> 2    2.
#> 3    3.

tib <- tibble(v = list(vec_fac))
unnest(tib, v)
#> # A tibble: 3 x 1
#>   v    
#>   <fct>
#> 1 1    
#> 2 2    
#> 3 3

Created on 2018-03-28 by the reprex package (v0.2.0).

Session info

devtools::session_info()
#> Session info -------------------------------------------------------------
#>  setting  value                       
#>  version  R version 3.4.3 (2017-11-30)
#>  system   x86_64, mingw32             
#>  ui       RTerm                       
#>  language (EN)                        
#>  collate  French_France.1252          
#>  tz       Europe/Paris                
#>  date     2018-03-28
#> Packages -----------------------------------------------------------------
#>  package     * version    date       source                            
#>  ansistrings   1.0.0.9000 2018-03-28 Github (r-lib/ansistrings@4e4d309)
#>  assertthat    0.2.0      2017-04-11 CRAN (R 3.4.0)                    
#>  backports     1.1.2      2017-12-13 CRAN (R 3.4.3)                    
#>  base        * 3.4.3      2017-12-06 local                             
#>  bindr         0.1.0.9000 2018-02-09 Github (krlmlr/bindr@4b20179)     
#>  bindrcpp      0.2.0.9000 2018-02-10 Github (krlmlr/bindrcpp@7553d4f)  
#>  cli           1.0.0.9002 2018-03-28 Github (r-lib/cli@53c129a)        
#>  compiler      3.4.3      2017-12-06 local                             
#>  crayon        1.3.4      2017-09-16 CRAN (R 3.4.2)                    
#>  datasets    * 3.4.3      2017-12-06 local                             
#>  devtools      1.13.5     2018-02-18 CRAN (R 3.4.3)                    
#>  digest        0.6.15     2018-01-28 CRAN (R 3.4.3)                    
#>  dplyr         0.7.4      2017-09-28 CRAN (R 3.4.3)                    
#>  evaluate      0.10.1     2017-06-24 CRAN (R 3.4.2)                    
#>  glue          1.2.0      2017-10-29 CRAN (R 3.4.2)                    
#>  graphics    * 3.4.3      2017-12-06 local                             
#>  grDevices   * 3.4.3      2017-12-06 local                             
#>  hms           0.4.2      2018-03-10 CRAN (R 3.4.3)                    
#>  htmltools     0.3.6      2017-04-28 CRAN (R 3.4.2)                    
#>  knitr         1.20       2018-02-20 CRAN (R 3.4.3)                    
#>  magrittr      1.5        2014-11-22 CRAN (R 3.4.2)                    
#>  memoise       1.1.0      2017-04-21 CRAN (R 3.4.3)                    
#>  methods     * 3.4.3      2017-12-06 local                             
#>  pillar        1.2.1      2018-02-27 CRAN (R 3.4.3)                    
#>  pkgconfig     2.0.1      2017-03-21 CRAN (R 3.4.0)                    
#>  prettyunits   1.0.2      2015-07-13 CRAN (R 3.4.0)                    
#>  progress      1.1.2.9002 2018-03-28 Github (r-lib/progress@72c9873)   
#>  purrr         0.2.4.9000 2018-02-05 Github (cderv/purrr@249a3e9)      
#>  R6            2.2.2      2017-06-17 CRAN (R 3.4.2)                    
#>  Rcpp          0.12.16    2018-03-13 CRAN (R 3.4.4)                    
#>  rlang         0.2.0.9001 2018-03-28 Github (tidyverse/rlang@49d7a34)  
#>  rmarkdown     1.8.10     2018-02-24 Github (rstudio/rmarkdown@1ccf6a0)
#>  rprojroot     1.3-2      2018-01-03 CRAN (R 3.4.3)                    
#>  selectr       0.3-2      2018-03-05 CRAN (R 3.4.3)                    
#>  stats       * 3.4.3      2017-12-06 local                             
#>  stringi       1.1.7      2018-03-12 CRAN (R 3.4.3)                    
#>  stringr       1.3.0      2018-02-19 CRAN (R 3.4.3)                    
#>  tibble      * 1.4.2      2018-03-28 Github (tidyverse/tibble@5f0b6a0) 
#>  tidyr       * 0.8.0.9000 2018-03-28 Github (tidyverse/tidyr@32b73ea)  
#>  tidyselect    0.2.4      2018-02-26 CRAN (R 3.4.3)                    
#>  tools         3.4.3      2017-12-06 local                             
#>  utf8          1.1.3      2018-01-03 CRAN (R 3.4.3)                    
#>  utils       * 3.4.3      2017-12-06 local                             
#>  withr         2.1.2      2018-03-28 Github (r-lib/withr@79d7b0d)      
#>  xml2          1.1.0      2017-01-07 url                               
#>  yaml          2.1.18     2018-03-08 CRAN (R 3.4.3)

[erblast]

thanks for letting me know

[batpigandme]

Glad it's fixed! Thanks for tracking this one, @cderv!