approx's new na.rm=FALSE does not play well with 'ties' argument.  (R-devel post 3.6.1)

<<- should not make new binding in .GlobalEnv

tools::upupdate_pkg_po/en_quote failure at startsWith(lines[current], "\"")

postscript() with invalid title generates corrupt eps file.

should recursive package dependencies be checked in install.packages()?

Rscript.c looks for R home using RHOME env-var instead of R_HOME

Consistency and customisation of printing and autoprinting

"finite number modulo infinity" not agreeing with IEEE 754 definitions

'R CMD check' fails to report "missing or unexported objects" when they are replacement functions used on the left side

Fix `R_tryCatch()` with non-abortive conditions

Replace `R_tryEval()` by `R_tryCatch()` in native code of methods package

Add `classes` argument to `suppressWarnings()`

Improve User-Agent and HTTP header support in all download methods

Bug in tools::en_quote - may fail due to out-of-bounds error

Warning for \Sexpr[stage=render] for a top level section, during installation

Data frames are printed with messed up column adjustment if `na.print` contains non-ASCII characters

'R CMD check' checks for GNU extensions in Makefiles even when GNU make is in SystemRequirements

tools:::as.character.Rd adds extra braces to `\if{html}{}`

`format.object_size` cannot deal with digits = NULL

Extra backslash in section 2.6 Character vectors

[INVALID] _R_CHECK_LENGTH_1_LOGIC2_=true check on 'LHS || RHS' does not apply to RHS

improve handling of long paths on Windows

In Windows shell, Korean characters are not displayed at all.

tools::md5sum fails for paths with non-ASCII characters on Windows

readLines("stdin", encoding="xxx") has buffering with command line.

More informative error message when R CMD build fails to build vignette

read.csv is reading less rows that data.table::fread

clarify that boxplot(...)$n counts _non-NA_ observations

Sys.glob() and .libPaths() can not deal with path with Chinese

parse() doesn't honor unicode in NFD normalization

WISH: Make parallel::detectCores() agile to new env var R_DEFAULT_CORES