• a possible bug

I'm importing a dataset with Qualtrics-related metadata that someone sent me. The attributes are a bit dirty, so I use gather_attrs to clean them up. I think this used to work fine, but it throws two warnings:

Warning messages:
1: In if (grepl("labelled", class(x[[i]]))) { :
the condition has length > 1 and only the first element will be used
2: Unknown or uninitialised column: 'foreign'.

I think the first warning now leads to an error on winbuilder because of R_CHECK_LENGTH_1_LOGIC2. You fixed it already for standardize_attrs.

## load package
library("rio")
x <- structure(list(Q11 = structure(c(4L, 1L), class = c("ordered", 
                                                         "factor"), .Label = c("Extremely useful", "Very useful", "Moderately useful", 
                                                                               "Slightly useful", "Not useful at all"), label = c(Q11 = "How useful are the services provided at the on-campus career center?"))), row.names = c(NA, 
                                                                                                                                                                                                                                 -2L), class = c("tbl_df", "tbl", "data.frame"))

gather_attrs(x)

session info for your system

> sessionInfo()
R version 3.5.1 (2018-07-02)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Sierra 10.12.6

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.5/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] rio_0.5.16     dplyr_0.7.8    codebook_0.7.6