This blog is updated daily.
A general description is here.
‘head(x, n)’ and ‘tail(x, n)’ now signal an error if ‘n’ is not numeric, instead of incidentally “working” sometimes returning all of ‘x’. Reported and discussed by Colin Fay, in PR#18357.
New function ‘utils::findCRANmirror()’ to find out if a CRAN mirror has been selected, otherwise fallback to the main site. This behaves in the same way as ‘tools::CRAN_package_db()’ and is intended for packages wishing to access CRAN for purposes other than installing packages.
The need for this was shown by a day when the main CRAN website was offline and a dozen or so packages which had its URL hardcoded failed their checks.
The libraries searched for by ‘--with-blas’ (without a value) now include BLIS (after OpenBLAS but before ATLAS). And on macOS, the Accelerate framework (after ATLAS). (This is patterned after the ‘AX_BLAS’ macro from the Autoconf Archive.)
The included LAPACK sources have been updated to 3.10.1.
The (full path to) the command ‘tidy’ to be used for HTML validation can be set by environment variable ‘R_TIDYCMD’.
Setting environment variable ‘_R_CHECK_RD_VALIDATE_RD2HTML_’ to a false value will override ‘R CMD check --as-cran’ and turn off HTML validation. This provides a way to circumvent a problematic ‘tidy’.
The 2006 version that ships with macOS is always skipped.
The undocumented legacy declarations of ‘Sint’, ‘Sfloat’, ‘SINT_MAX’ and ‘SINT_MIN’ in header ‘R.h’ are deprecated.
‘fisher.test(d)’ no longer segfaults for “large” ‘d’; fixing PR#18336 by preventing/detecting an integer overflow reliably.
‘tar(., files=*)’ now produces correctly the warning about invalid uid or gid of files, fixing PR#18344, reported by Martin Morgan.
‘tk_choose.files()’ with ‘multi = FALSE’ misbehaved on paths containing spaces (PR#18334) (regression introduced in R 4.0.0).
‘sort(x, partial = ind, *)’ now works correctly notably for the non-default ‘na.last = FALSE’ or ‘TRUE’, fixing PR#18335 reported by James Edwards.
Environment variable ‘_R_CHECK_XREFS_REPOSITORIES_’ is only used for checking ‘.Rd’ cross-references in ‘R CMD check’ (as documented) and not for other uses looking for a CRAN mirror.
The search for a CRAN mirror when checking packages now uses ‘getOption("repos")’ if that specifies a CRAN mirror, even when it does not also specify all three Bioconductor repositories (as was previously required).
The HTML code generated by ‘tools::Rd2HTML()’ has been improved to pass ‘tidy’ 5.8.0.
Writing to a clipboard connection works again, fixing a regression in R 4.2.0 (PR#18332). Re-using a closed clipboard connection longer issues a spurious warning about an ignored encoding argument.
C function ‘getlocale’ no longer attempts to query an unsupported category from the OS, even when requested at R level, which may cause crashes when R 4.2.0 (which uses UCRT) is embedded (reported by Kevin Ushey).
Accent keys now work in GraphApp Unicode windows, which are used by ‘Rgui’ whenever running in a multibyte locale (so also in UTF-8, hence fixing a regression in R 4.2.0 for users of systems where R 4.1 used a single-byte locale).
Completion in ‘Rgui’ now works also with non-ASCII characters.
‘Rgui’ no longer truncates usage information with ‘--help’.
Text injection from external applications via ‘SendInput’ now works in GraphApp Unicode windows, fixing a regression in R 4.2.0 for ‘Rgui’ users of systems where R 4.1 used a single-byte locale but R 4.2.0 uses UTF-8.
Performance of ‘txtProgressBar()’ in ‘Rgui’ when running in a multi-byte locale has been improved (fixing a performance regression in R 4.2.0 for users of systems where R 4.1 used a single-byte locale).
The script editor in ‘Rgui’ now works also on systems using UTF-8 as the native encoding. Users of the script editor have to convert their scripts with non-ASCII characters to UTF-8 before reading them in R 4.2.1 or newer (on recent Windows where UTF-8 is used). This fixes a regression in R 4.2.0, which prevented some operations with scripts when they contained non-ASCII characters.