packrat hangs rstudio preview when new packages are added to a script

I have a script that installs required packages for a project. I was adding new packages to install to this script and RStudio Preview 1.2 responses became slower, eventually becoming unresponsive all together and hanging.

The last thing I did before everything became completely unresponsive was try to pull up the help page for a local package. I also had a notebook open which I was trying to edit and there was a message in the console saying it was quiting from lines 115 - 180 (which contain an sql chunk). The hang lasted about 20 minutes.

When I shut down RStudio and restarted the project it did not hang, but responses were sometimes a bit slow.

I am using:

• RStudio preview Version 1.2.1237

See below for rest of session info:

> sessionInfo()
R version 3.5.2 (2018-12-20)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 17134)

Matrix products: default

locale:
[1] LC_COLLATE=English_United Kingdom.1252  LC_CTYPE=English_United Kingdom.1252   
[3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C                           
[5] LC_TIME=English_United Kingdom.1252
attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] rgisws_0.1.5       openxlsx_4.1.0     lubridate_1.7.4    PKI_0.1-5.1        base64enc_0.1-3   
 [6] RPostgreSQL_0.6-2  DBI_1.0.0          config_0.3         here_0.1           packrat_0.4.9-3   
[11] phemisc_0.0.0.9000 data.table_1.12.0 

loaded via a namespace (and not attached):
 [1] pkgload_1.0.2      jsonlite_1.6       StanHeaders_2.17.2 assertthat_0.2.0   expm_0.999-3      
 [6] BiocManager_1.30.4 sp_1.3-1           stats4_3.5.2       yaml_2.2.0         remotes_2.0.2     
[11] sessioninfo_1.1.1  pillar_1.3.1       backports_1.1.3    lattice_0.20-38    glue_1.3.0        
[16] digest_0.6.18      colorspace_1.4-0   htmltools_0.3.6    Matrix_1.2-15      plyr_1.8.4        
[21] pkgconfig_2.0.2    devtools_2.0.1     rstan_2.17.3       purrr_0.2.5        mvtnorm_1.0-8     
[26] scales_1.0.0       processx_3.2.1     manipulate_1.0.1   tibble_2.0.1       ggplot2_3.1.0     
[31] usethis_1.4.0      withr_2.1.2        lazyeval_0.2.1     cli_1.0.1          magrittr_1.5      
[36] crayon_1.3.4       memoise_1.1.0      evaluate_0.12      ps_1.3.0           fs_1.2.6          
[41] MASS_7.3-51.1      foreign_0.8-71     pkgbuild_1.0.2     tools_3.5.2        prettyunits_1.0.2 
[46] geosphere_1.5-7    stringr_1.3.1      munsell_0.5.0      zip_1.0.0          bindrcpp_0.2.2    
[51] callr_3.1.1        compiler_3.5.2     rlang_0.3.1        grid_3.5.2         rstudioapi_0.9.0  
[56] rmarkdown_1.11     boot_1.3-20        testthat_2.0.1     DescTools_0.99.26  gtable_0.2.0      
[61] inline_0.3.15      R6_2.3.0           gridExtra_2.3      knitr_1.21         dplyr_0.7.8       
[66] bindr_0.1.1        rprojroot_1.3-2    desc_1.2.0         stringi_1.2.4      Rcpp_1.0.0        
[71] tidyselect_0.2.5   xfun_0.4   





 

Start by reproducing the reported hang while adding packages to an installation script, opening help for a local package, and editing the notebook's SQL chunk in RStudio Preview. Use the provided sessionInfo and package versions to narrow the environment; done means identifying a reproducible cause and confirming that the preview remains responsive in the same scenario.