parallel::makeCluster() freezes in R-3.5.1 but runs fine in R-3.6.0

[leungi]

The following freezes in R-3.5.1 but runs fine in R-3.6.0.

cl <- parallel::makeCluster(getOption("cl.cores", 2))

System Info

sessioninfo::platform_info(); sessioninfo::session_info()
#>  setting  value                       
#>  version  R version 3.5.1 (2018-07-02)
#>  os       Windows 10 x64              
#>  system   x86_64, mingw32             
#>  ui       RTerm                       
#>  language (EN)                        
#>  collate  English_United States.1252  
#>  ctype    English_United States.1252  
#>  tz       America/Chicago             
#>  date     2019-09-09
#> - Session info ----------------------------------------------------------
#>  setting  value                       
#>  version  R version 3.5.1 (2018-07-02)
#>  os       Windows 10 x64              
#>  system   x86_64, mingw32             
#>  ui       RTerm                       
#>  language (EN)                        
#>  collate  English_United States.1252  
#>  ctype    English_United States.1252  
#>  tz       America/Chicago             
#>  date     2019-09-09                  
#> 
#> - Packages --------------------------------------------------------------
#>  package     * version    date       lib source                        
#>  assertthat    0.2.1      2019-03-21 [1] CRAN (R 3.5.3)                
#>  cli           1.1.0      2019-03-19 [1] CRAN (R 3.5.3)                
#>  crayon        1.3.4      2017-09-16 [1] CRAN (R 3.5.3)                
#>  digest        0.6.20     2019-07-04 [1] CRAN (R 3.5.1)                
#>  evaluate      0.14       2019-05-28 [1] CRAN (R 3.5.1)                
#>  highr         0.8        2019-03-20 [1] CRAN (R 3.5.3)                
#>  htmltools     0.3.6      2017-04-28 [1] CRAN (R 3.5.3)                
#>  knitr         1.24.4     2019-09-02 [1] Github (yihui/knitr@52edc22)  
#>  magrittr      1.5        2014-11-22 [1] CRAN (R 3.5.1)                
#>  Rcpp          1.0.2.1    2019-08-14 [1] Github (RcppCore/Rcpp@1789f09)
#>  rmarkdown     1.15       2019-08-21 [1] CRAN (R 3.5.3)                
#>  sessioninfo   1.1.1      2018-11-05 [1] CRAN (R 3.5.1)                
#>  stringi       1.4.3      2019-03-12 [1] CRAN (R 3.5.3)                
#>  stringr       1.4.0      2019-02-10 [1] CRAN (R 3.5.3)                
#>  withr         2.1.2.9000 2019-08-17 [1] Github (r-lib/withr@bd39098)  
#>  xfun          0.9        2019-08-21 [1] CRAN (R 3.5.3)                
#>  yaml          2.2.0      2018-07-25 [1] CRAN (R 3.5.1)                
#> 
#> [1] C:/Users/Public/Data/R/R-3.5.1/library

^{Created on 2019-09-09 by the reprex package (v0.2.1)}

[jeroen]

You need to report this in https://bugs.r-project.org/bugzilla/

[leungi]

Noted; thanks for pointer @jeroen,

Just realized there isn't a sign-up option in https://bugs.r-project.org/bugzilla/.

Who may I contact to do so?