This blog is updated daily.
A general description is here.
New convenience function ‘Rcmd()’ in package ‘tools’ for invoking ‘R CMD’ tools from within R.
New functions ‘makevars_user()’ and ‘makevars_site()’ in package ‘tools’ to determine the location of the user and site specific ‘Makevars’ files for customizing package compilation.
‘diag(NULL, 1)’ crashed because of missed type checking. (PR#16853)