Skim may fail when column names are similar except for case

Reproducible example:

require(skimr)
data <- data.frame(x = 1, X = 2)
print(data)
summary(data)
skim(data)

Results:

R version 4.0.2 (2020-06-22) -- "Taking Off Again"
Copyright (C) 2020 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> require(skimr)
data <- data.frame(x = 1, X = 2)
print(data)
summary(data)
skim(data)
Loading required package: skimr
  x X
1 1 2
       x           X    
 Min.   :1   Min.   :2  
 1st Qu.:1   1st Qu.:2  
 Median :1   Median :2  
 Mean   :1   Mean   :2  
 3rd Qu.:1   3rd Qu.:2  
 Max.   :1   Max.   :2  
Error: Problem with `summarise()` input `skimmed`.
✖ Names must be unique.
✖ These names are duplicated:
  * "n_missing" at locations 2 and 3.
  * "complete_rate" at locations 4 and 5.
  * "numeric.mean" at locations 6 and 7.
  * "numeric.sd" at locations 8 and 9.
  * "numeric.p0" at locations 10 and 11.
  * ...
ℹ Use argument `names_repair` to specify repair strategy.
ℹ Input `skimmed` is `purrr::map2(...)`.
ℹ The error occurred in group 1: skim_type = "numeric".
Run `rlang::last_error()` to see where the error occurred.
> R.version
               _                           
platform       x86_64-pc-linux-gnu         
arch           x86_64                      
os             linux-gnu                   
system         x86_64, linux-gnu           
status                                     
major          4                           
minor          0.2                         
year           2020                        
month          06                          
day            22                          
svn rev        78730                       
language       R                           
version.string R version 4.0.2 (2020-06-22)
nickname       Taking Off Again            
> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux rodete

Matrix products: default
BLAS:   /opt/R/4.0.2/lib/R/lib/libRblas.so
LAPACK: /opt/R/4.0.2/lib/R/lib/libRlapack.so

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

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

other attached packages:
[1] skimr_2.1.2

loaded via a namespace (and not attached):
 [1] tidyr_1.1.1      fansi_0.4.1      assertthat_0.2.1 digest_0.6.25   
 [5] crayon_1.3.4     dplyr_1.0.1      repr_1.1.0       R6_2.4.1        
 [9] jsonlite_1.7.0   lifecycle_0.2.0  magrittr_1.5     pillar_1.4.6    
[13] cli_2.0.2        rlang_0.4.7      vctrs_0.3.2      generics_0.0.2  
[17] ellipsis_0.3.1   tools_4.0.2      glue_1.4.1       purrr_0.3.4     
[21] xfun_0.16        compiler_4.0.2   base64enc_0.1-3  pkgconfig_2.0.3 
[25] htmltools_0.5.0  knitr_1.29       tidyselect_1.1.0 tibble_3.0.3

ropensci / skimr

Skim may fail when column names are similar except for case #615