R 4.3.1

CHANGES IN R 4.3.1

C-LEVEL FACILITIES:

• The C-level API version of R's integrate(), Rdqags() in Applic.h,
  now returns the correct number of integrand evaluations neval,
  fixing PR#18515 reported and diagnosed by Stephen Wade.

• The C prototypes for LAPACK calls dspgv and dtptrs in
  R_exts/Lapack.h had one too many and one too few character length
  arguments - but this has not caused any known issues. To get the
  corrected prototypes, include

  #include <Rconfig.h> // for PR18534fixed
  #ifdef PR18534fixed
  # define usePR18534fix 1
  #endif
  #include <R_exts/Lapack.h>
  

  in your C/C++ code (PR#18534).

INSTALLATION:

• Many of the checks of esoteric Internet operations and those
  using unreliable external sites have been moved to a new target
  that is not run by default and primarily intended for the core
  developers. To run them use

    cd tests; make test-Internet-dev
  

BUG FIXES:

• .S3methods(), typically called from methods(), again marks
  methods from package base as visible.

  Also, the visibility of non-base methods is again determined by
  the method's presence in search().

• tools::Rdiff() is now more robust against invalid strings, fixing
  installation tests on Windows without Rtools installed
  (PR#18530).

• Fix (new) bug in hcl.colors(2, *), by Achim Zeileis (PR#18523).

• head(., <illegal>) and tail(..) now produce more useful
  "Error in ...." error messages, fixing PR#18362.

• Package code syntax on Windows is checked in UTF-8 when UTF-8 is
  the native encoding.

• na.contiguous(x) now also returns the first run, when it is at
  the beginning and there is a later one of the same length;
  reported to R-devel, including a fix, by Georgi Boshnakov.
  Further, by default, it modifies only an existing attr(*,"tsp")
  but otherwise no longer sets one.

• chol(<not pos.def>, pivot = <T|F>) now gives a correct error or
  warning message (depending on pivot), thanks to Mikael Jagan's
  (PR#18541).