check_namespace() fails in package directory on German Windows 8

[katrinleinweber]

Thank you for your ROpenSci community call presentation recently :-)

As a package developer, I tried check_namespace(".") on my own package just now (also ../pkg_name) and got Error in strsplit(all_imports$import, "::") : non-character argument

> sessionInfo()
R version 3.6.0 (2019-04-26)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

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

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

other attached packages:
[1] testthat_2.1.1

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.1          rstudioapi_0.10     magrittr_1.5       
 [4] usethis_1.5.0.9000  devtools_2.0.2      pkgload_1.0.2      
 [7] R6_2.4.0            rlang_0.3.4         sys_3.2            
[10] tools_3.6.0         pkgbuild_1.0.3      sessioninfo_1.1.1  
[13] cli_1.1.0           withr_2.1.2         askpass_1.1        
[16] remotes_2.0.4       openssl_1.3         yaml_2.2.0         
[19] assertthat_0.2.1    digest_0.6.18       rprojroot_1.3-2    
[22] crayon_1.3.4        gpg_1.2             processx_3.3.1     
[25] callr_3.2.0         ropsec_0.2.0.9000   fs_1.3.1           
[28] ps_1.3.0            curl_3.3            memoise_1.1.0      
[31] glue_1.3.1          stringi_1.4.3       defender_0.0.1.9000
[34] compiler_3.6.0      desc_1.2.0          backports_1.1.4    
[37] prettyunits_1.0.2