Strange warnings after amc::.gc() from a clean R session

[CeresBarros]

Restarting R session...

> amc::.gc()
Warning messages:
1: failed to assign RegisteredNativeSymbol for checkCRSArgs to checkCRSArgs since checkCRSArgs is already defined in the ‘rgdal’ namespace 
2: failed to assign RegisteredNativeSymbol for ogrInfo to ogrInfo since ogrInfo is already defined in the ‘rgdal’ namespace 
3: failed to assign RegisteredNativeSymbol for ogrFIDs to ogrFIDs since ogrFIDs is already defined in the ‘rgdal’ namespace 
4: failed to assign RegisteredNativeSymbol for ogrListLayers to ogrListLayers since ogrListLayers is already defined in the ‘rgdal’ namespace 
5: failed to assign RegisteredNativeSymbol for ogrDeleteLayer to ogrDeleteLayer since ogrDeleteLayer is already defined in the ‘rgdal’ namespace 
6: failed to assign RegisteredNativeSymbol for ogrDeleteDataSource to ogrDeleteDataSource since ogrDeleteDataSource is already defined in the ‘rgdal’ namespace 
7: failed to assign RegisteredNativeSymbol for projInfo to projInfo since projInfo is already defined in the ‘rgdal’ namespace 
8: failed to assign RegisteredNativeSymbol for project to project since project is already defined in the ‘rgdal’ namespace 

My session info:

> sessionInfo()
R version 3.5.1 (2018-07-02)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

Matrix products: default

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

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

loaded via a namespace (and not attached):
 [1] tidyselect_0.2.5        remotes_2.0.2           sf_0.7-3                purrr_0.3.0             lattice_0.20-38        
 [6] testthat_2.0.1          colorspace_1.4-0        base64enc_0.1-3         blob_1.1.1              rlang_0.3.1            
[11] archivist_2.3.2         e1071_1.7-0.1           R.oo_1.22.0             pillar_1.3.1            glue_1.3.0             
[16] DBI_1.0.0               R.utils_2.8.0           sp_1.3-1                bit64_0.9-7             RColorBrewer_1.1-2     
[21] plyr_1.8.4              foreach_1.4.4           stringr_1.4.0           rgeos_0.4-2             munsell_0.5.0          
[26] gtable_0.2.0            reproducible_0.2.6.9003 raster_2.8-19           R.methodsS3_1.7.1       quickPlot_0.1.6        
[31] codetools_0.2-16        memoise_1.1.0           class_7.3-15            parallel_3.5.1          gdalUtils_2.0.1.14     
[36] Rcpp_1.0.0              classInt_0.3-1          backports_1.1.3         scales_1.0.0            fpCompare_0.2.2        
[41] fasterize_1.0.0         fastdigest_0.6-3        bit_1.1-14              versions_0.3            ggplot2_3.1.0          
[46] digest_0.6.18           stringi_1.3.1           dplyr_0.8.0.1           dismo_1.1-4             grid_3.5.1             
[51] rgdal_1.3-9             tools_3.5.1             bitops_1.0-6            magrittr_1.5            lazyeval_0.2.1         
[56] RCurl_1.95-4.11         tibble_2.0.1            RSQLite_2.1.1           crayon_1.3.4            pkgconfig_2.0.2        
[61] gridBase_0.4-7          data.table_1.12.0       lubridate_1.7.4         googledrive_0.1.3       assertthat_0.2.0       
[66] httr_1.4.0              rstudioapi_0.9.0        iterators_1.0.10        R6_2.4.0                units_0.6-2            
[71] amc_0.1.4.9000          flock_0.7               igraph_1.2.4            compiler_3.5.1          git2r_0.24.0  

[achubaty]

Are you using the most recent development version? I can't reproduce this using R 3.5.2.

[CeresBarros]

After some digging around, the issue seemed to disappear after I reinstalled rgdal from CRAN. So, closed :)