The build system rolled up R-4.1.0.tar.gz (codename "Camp Pontanezen") this morning. This is a major update, notably containing the new native pipe operator "|>" and shorthand inline functions "\(x) x+1". The list below details the changes in this release. You can get the source code from https://cran.r-project.org/src/base/R-4/R-4.1.0.tar.gz or wait for it to be mirrored at a CRAN site nearer to you. Binaries for various platforms will appear in due course. For the R Core Team, Peter Dalgaard These are the checksums (md5 and SHA-256) for the freshly created files, in case you wish to check that they are uncorrupted: MD5 (AUTHORS) = b9c44f9f78cab3184ad9898bebc854b4 MD5 (COPYING) = eb723b61539feef013de476e68b5c50a MD5 (COPYING.LIB) = a6f89e2100d9b6cdffcea4f398e37343 MD5 (FAQ) = 639fbbba9998cae70ef058be42b80a52 MD5 (INSTALL) = 7893f754308ca31f1ccf62055090ad7b MD5 (NEWS) = b02805558a8315f1a93c7f7d7cd879c1 MD5 (NEWS.0) = bfcd7c147251b5474d96848c6f57e5a8 MD5 (NEWS.1) = eb78c4d053ec9c32b815cf0c2ebea801 MD5 (NEWS.2) = a767f7809324c73c49eaff47d14bce81 MD5 (NEWS.3) = e55ed2c8a547b827b46e08eb7137ba23 MD5 (R-latest.tar.gz) = bd80f97d0e46a71408f5bc25652a0203 MD5 (README) = f468f281c919665e276a1b691decbbe6 MD5 (RESOURCES) = 529223fd3ffef95731d0a87353108435 MD5 (THANKS) = 251d20510bfc3cc93b82c5a99f7efcc6 MD5 (VERSION-INFO.dcf) = 1f3cf39735afb48fea434bca2b7bf483 MD5 (R-4/R-4.1.0.tar.gz) = bd80f97d0e46a71408f5bc25652a0203 2cde824a7b18958e5f06b391c801c8288be0f84fa8934b7ddefef23c67e60c09 AUTHORS e6d6a009505e345fe949e1310334fcb0747f28dae2856759de102ab66b722cb4 COPYING 6095e9ffa777dd22839f7801aa845b31c9ed07f3d6bf8a26dc5d2dec8ccc0ef3 COPYING.LIB 0dce85f38b9d6351a1b63f057dfbc7f572966245add12946482e57e60d41547c FAQ f87461be6cbaecc4dce44ac58e5bd52364b0491ccdadaf846cb9b452e9550f31 INSTALL 20e7185fb5af0f2ac825b27c16afd57ff206726117c6ac5cf7c6f230337af093 NEWS 4e21b62f515b749f80997063fceab626d7258c7d650e81a662ba8e0640f12f62 NEWS.0 12b30c724117b1b2b11484673906a6dcd48a361f69fc420b36194f9218692d01 NEWS.1 ba74618bc3f4c0e336dca13d472402a1863d12ba6f7f91a1782bc469ee986f6d NEWS.2 1910a2405300b9bc7c76beeb0753a5249cf799afe175ce28f8d782fab723e012 NEWS.3 e8e68959d7282ca147360fc9644ada9bd161bab781bab14d33b8999a95182781 R-latest.tar.gz 2fdd3e90f23f32692d4b3a0c0452f2c219a10882033d1774f8cadf25886c3ddc README 408737572ecc6e1135fdb2cf7a9dbb1a6cb27967c757f1771b8c39d1fd2f1ab9 RESOURCES c9c7cb32308b4e560a22c858819ade9de524a602abd4e92d1c328c89f8037d73 THANKS 2f834a058dcfcdfb7eedf45aa0d897ea1a7c43a9460ffd22f73b60919cb1bf57 VERSION-INFO.dcf e8e68959d7282ca147360fc9644ada9bd161bab781bab14d33b8999a95182781 R-4/R-4.1.0.tar.gz This is the relevant part of the NEWS file CHANGES IN R 4.1.0: FUTURE DIRECTIONS: * It is planned that the 4.1.x series will be the last to support 32-bit Windows, with production of binary packages for that series continuing until early 2023. SIGNIFICANT USER-VISIBLE CHANGES: * Data set esoph in package datasets now provides the correct numbers of controls; previously it had the numbers of cases added to these. (Reported by Alexander Fowler in PR#17964.) NEW FEATURES: * www.omegahat.net is no longer one of the repositories known by default to setRepositories(). (Nowadays it only provides source packages and is often unavailable.) * Function package_dependencies() (in package tools) can now use different dependency types for direct and recursive dependencies. * The checking of the size of tarball in R CMD check --as-cran <pkg> may be tweaked via the new environment variable _R_CHECK_CRAN_INCOMING_TARBALL_THRESHOLD_, as suggested in PR#17777 by Jan Gorecki. * Using c() to combine a factor with other factors now gives a factor, an ordered factor when combining ordered factors with identical levels. * apply() gains a simplify argument to allow disabling of simplification of results. * The format() method for class "ftable" gets a new option justify. (Suggested by Thomas Soeiro.) * New ...names() utility. (Proposed by Neal Fultz in PR#17705.) * type.convert() now warns when its as.is argument is not specified, as the help file always said it _should_. In that case, the default is changed to TRUE in line with its change in read.table() (related to stringsAsFactor) in R 4.0.0. * When printing list arrays, classed objects are now shown _via_ their format() value if this is a short enough character string, or by giving the first elements of their class vector and their length. * capabilities() gets new entry "Rprof" which is TRUE when R has been configured with the equivalent of --enable-R-profiling (as it is by default). (Related to Michael Orlitzky's report PR#17836.) * str(xS4) now also shows extraneous attributes of an S4 object xS4. * Rudimentary support for vi-style tags in rtags() and R CMD rtags has been added. (Based on a patch from Neal Fultz in PR#17214.) * checkRdContents() is now exported from tools; it and also checkDocFiles() have a new option chkInternal allowing to check Rd files marked with keyword "internal" as well. The latter can be activated for R CMD check via environment variable _R_CHECK_RD_INTERNAL_TOO_. * New functions numToBits() and numToInts() extend the raw conversion utilities to (double precision) numeric. * Functions URLencode() and URLdecode() in package utils now work on vectors of URIs. (Based on patch from Bob Rudis submitted with PR#17873.) * path.expand() can expand ~user on most Unix-alikes even when readline is not in use. It tries harder to expand ~, for example should environment variable HOME be unset. * For HTML help (both dynamic and static), Rd file links to help pages in external packages are now treated as references to topics rather than file names, and fall back to a file link only if the topic is not found in the target package. The earlier rule which prioritized file names over topics can be restored by setting the environment variable _R_HELP_LINKS_TO_TOPICS_ to a false value. * c() now removes NULL arguments before dispatching to methods, thus simplifying the implementation of c() methods, _but_ for back compatibility keeps NULL when it is the first argument. (From a report and patch proposal by Lionel Henry in PR#17900.) * Vectorize()'s result function's environment no longer keeps unneeded objects. * Function ...elt() now propagates visibility consistently with ..n. (Thanks to Lionel Henry's PR#17905.) * capture.output() no longer uses non-standard evaluation to evaluate its arguments. This makes evaluation of functions like parent.frame() more consistent. (Thanks to Lionel Henry's PR#17907.) * packBits(bits, type="double") now works as inverse of numToBits(). (Thanks to Bill Dunlap's proposal in PR#17914.) * curlGetHeaders() has two new arguments, timeout to specify the timeout for that call (overriding getOption("timeout")) and TLS to specify the minimum TLS protocol version to be used for https:// URIs (_inter alia_ providing a means to check for sites using deprecated TLS versions 1.0 and 1.1). * For nls(), an optional constant scaleOffset may be added to the denominator of the relative offset convergence test for cases where the fit of a model is expected to be exact, thanks to a proposal by John Nash. nls(*, trace=TRUE) now also shows the convergence criterion. * Numeric differentiation _via_ numericDeriv() gets new optional arguments eps and central, the latter for taking central divided differences. The latter can be activated for nls() via nls.control(nDcentral = TRUE). * nls() now passes the trace and control arguments to getInitial(), notably for all self-starting models, so these can also be fit in zero-noise situations via a scaleOffset. For this reason, the initial function of a selfStart model must now have ... in its argument list. * bquote(splice = TRUE) can now splice expression vectors with attributes: this makes it possible to splice the result of parse(keep.source = TRUE). (Report and patch provided by Lionel Henry in PR#17869.) * textConnection() gets an optional name argument. * get(), exists(), and get0() now signal an error if the first argument has length greater than 1. Previously additional elements were silently ignored. (Suggested by Antoine Fabri on R-devel.) * R now provides a shorthand notation for creating functions, e.g. \(x) x + 1 is parsed as function(x) x + 1. * R now provides a simple native forward pipe syntax |>. The simple form of the forward pipe inserts the left-hand side as the first argument in the right-hand side call. The pipe implementation as a syntax transformation was motivated by suggestions from Jim Hester and Lionel Henry. * all.equal(f, g) for functions now by default also compares their environment(.)s, notably via new all.equal method for class function. Comparison of nls() fits, e.g., may now need all.equal(m1, m2, check.environment = FALSE). * .libPaths() gets a new option include.site, allowing to _not_ include the site library. (Thanks to Dario Strbenac's suggestion and Gabe Becker's PR#18016.) * Lithuanian translations are now available. (Thanks to Rimantas Zakauskas.) * names() now works for DOTSXP objects. On the other hand, in R-lang, the R language manual, we now warn against relying on the structure or even existence of such dot-dot-dot objects. * all.equal() no longer gives an error on DOTSXP objects. * capabilities("cairo") now applies only to the file-based devices as it is now possible (if very unusual) to build R with Cairo support for those but not for X11(). * There is optional support for tracing the progress of loadNamespace() - see its help. * (Not Windows.) l10n_info() reports an additional element, the name of the encoding as reported by the OS (which may differ from the encoding part (if any) of the result from Sys.getlocale("LC_CTYPE"). * New function gregexec() which generalizes regexec() to find _all_ disjoint matches and well as all substrings corresponding to parenthesized subexpressions of the given regular expression. (Contributed by Brodie Gaslam.) * New function charClass() in package utils to query the wide-character classification functions in use (such as iswprint). * The names of quantile()'s result no longer depend on the global getOption("digits"), but quantile() gets a new optional argument digits = 7 instead. * grep(), sub(), regexp and variants work considerably faster for long factors with few levels. (Thanks to Michael Chirico's PR#18063.) * Provide grouping of x11() graphics windows within a window manager such as Gnome or Unity; thanks to a patch by Ivan Krylov posted to R-devel. * The split() method for class data.frame now allows the f argument to be specified as a formula. * sprintf now warns on arguments unused by the format string. * New palettes "Rocket" and "Mako" for hcl.colors() (approximating palettes of the same name from the 'viridisLite' package). Contributed by Achim Zeileis. * The base environment and its namespace are now locked (so one can no longer add bindings to these or remove from these). * Rterm handling of multi-byte characters has been improved, allowing use of such characters when supported by the current locale. * Rterm now accepts ALT+ +xxxxxxxx sequences to enter Unicode characters as hex digits. * Environment variable LC_ALL on Windows now takes precedence over LC_CTYPE and variables for other supported categories, matching the POSIX behaviour. * duplicated() and anyDuplicated() are now optimized for integer and real vectors that are known to be sorted via the ALTREP framework. Contributed by Gabriel Becker via PR#17993. GRAPHICS: * The graphics engine version, R_GE_version, has been bumped to 14 and so packages that provide graphics devices should be reinstalled. * Graphics devices should now specify deviceVersion to indicate what version of the graphics engine they support. * Graphics devices can now specify deviceClip. If TRUE, the graphics engine will never perform any clipping of output itself. The clipping that the graphics engine does perform (for both canClip = TRUE and canClip = FALSE) has been improved to avoid producing unnecessary artifacts in clipped output. * The grid package now allows gpar(fill) to be a linearGradient(), a radialGradient(), or a pattern(). The viewport(clip) can now also be a grob, which defines a clipping path, and there is a new viewport(mask) that can also be a grob, which defines a mask. These new features are only supported so far on the Cairo-based graphics devices and on the pdf() device. * (Not Windows.) A warning is given when a Cairo-based type is specified for a png(), jpeg(), tiff() or bmp() device but Cairo is unsupported (so type = "Xlib" is tried instead). * grSoftVersion() now reports the versions of FreeType and FontConfig if they are used directly (not _via_ Pango), as is most commonly done on macOS. C-LEVEL FACILITIES: * The _standalone_ libRmath math library and R's C API now provide log1pexp() again as documented, and gain log1mexp(). INSTALLATION on a UNIX-ALIKE: * configure checks for a program pkgconf if program pkg-config is not found. These are now only looked for on the path (like almost all other programs) so if needed specify a full path to the command in PKG_CONFIG, for example in file config.site. * C99 function iswblank is required - it was last seen missing ca 2003 so the workaround has been removed. * There are new configure options --with-internal-iswxxxxx, --with-internal-towlower and --with-internal-wcwidth which allows the system functions for wide-character classification, case-switching and width (wcwidth and wcswidth) to be replaced by internal ones. The first has long been used on macOS, AIX (and Windows) but this enables it to be unselected there and selected for other platforms (it is the new default on Solaris). The second is new in this version of R and is selected by default on macOS and Solaris. The third has long been the default and remains so as it contains customizations for East Asian languages. System versions of these functions are often minimally implemented (sometimes only for ASCII characters) and may not cover the full range of Unicode points: for example Solaris (and Windows) only cover the Basic Multilingual Plane. * Cairo installations without X11 are more likely to be detected by configure, when the file-based Cairo graphics devices will be available but not X11(type = "cairo"). * There is a new configure option --with-static-cairo which is the default on macOS. This should be used when only static cairo (and where relevant, Pango) libraries are available. * Cairo-based graphics devices on platforms without Pango but with FreeType/FontConfig will make use of the latter for font selection. LINK-TIME OPTIMIZATION on a UNIX-ALIKE: * Configuring with flag --enable-lto=R now also uses LTO when installing the recommended packages. * R CMD INSTALL and R CMD SHLIB have a new flag --use-LTO to use LTO when compiling code, for use with R configured with --enable-lto=R. For R configured with --enable-lto, they have the new flag --no-use-LTO. Packages can opt in or out of LTO compilation _via_ a UseLTO field in the DESCRIPTION file. (As usual this can be overridden by the command-line flags.) BUILDING R on Windows: * for GCC >= 8, FC_LEN_T is defined in config.h and hence character lengths are passed from C to Fortran in _inter alia_ BLAS and LAPACK calls. * There is a new text file src/gnuwin32/README.compilation, which outlines how C/Fortran code compilation is organized and documents new features: * R can be built with Link-Time Optimization with a suitable compiler - doing so with GCC 9.2 showed several inconsistencies which have been corrected. * There is support for cross-compiling the C and Fortran code in R and standard packages on suitable (Linux) platforms. This is mainly intended to allow developers to test later versions of compilers - for example using GCC 9.2 or 10.x has detected issues that GCC 8.3 in Rtools40 does not. * There is experimental support for cross-building R packages with C, C++ and/or Fortran code. * The R installer can now be optionally built to support a single architecture (only 64-bit or only 32-bit). PACKAGE INSTALLATION: * The default C++ standard has been changed to C++14 where available (which it is on all currently checked platforms): if not (as before) C++11 is used if available otherwise C++ is not supported. Packages which specify C++11 will still be installed using C++11. C++14 compilers may give deprecation warnings, most often for std::random_shuffle (deprecated in C++14 and removed in C++17). Either specify C++11 (see 'Writing R Extensions') or modernize the code and if needed specify C++14. The latter has been supported since R 3.4.0 so the package's DESCRIPTION would need to include something like Depends: R (>= 3.4) PACKAGE INSTALLATION on Windows: * R CMD INSTALL and R CMD SHLIB make use of their flag --use-LTO when the LTO_OPT make macro is set in file etc/${R_ARCH}/Makeconf or in a personal/site Makevars file. (For details see 'Writing R Extensions' SS4.5.) This provides a valuable check on code consistency. It does work with GCC 8.3 as in Rtools40, but that does not detect everything the CRAN checks with current GCC do. PACKAGE INSTALLATION on macOS: * The default personal library directory on builds with --enable-aqua (including CRAN builds) now differs by CPU type, one of ~/Library/R/x86_64/x.y/library ~/Library/R/arm64/x.y/library This uses the CPU type R (and hence the packages) were built for, so when a x86_64 build of R is run under Rosetta emulation on an arm64 Mac, the first is used. UTILITIES: * R CMD check can now scan package functions for bogus return statements, which were possibly intended as return() calls (wish of PR#17180, patch by Sebastian Meyer). This check can be activated via the new environment variable _R_CHECK_BOGUS_RETURN_, true for --as-cran. * R CMD build omits tarballs and binaries of previous builds from the top-level package directory. (PR#17828, patch by Sebastian Meyer.) * R CMD check now runs sanity checks on the use of LazyData, for example that a data directory is present and that LazyDataCompression is not specified without LazyData and has a documented value. For packages with large LazyData databases without specifying LazyDataCompression, there is a reference to the code given in 'Writing R Extensions' SS1.1.6 to test the choice of compression (as in all the CRAN packages tested a non-default method was preferred). * R CMD build removes LazyData and LazyDataCompression fields from the DESCRIPTION file of packages without a data directory. ENCODING-RELATED CHANGES: * The parser now treats \Unnnnnnnn escapes larger than the upper limit for Unicode points (\U10FFFF) as an error as they cannot be represented by valid UTF-8. Where such escapes are used for outputting non-printable (including unassigned) characters, 6 hex digits are used (rather than 8 with leading zeros). For clarity, braces are used, for example \U{0effff}. * The parser now looks for non-ASCII spaces on Solaris (as previously on most other OSes). * There are warnings (including from the parser) on the use of unpaired surrogate Unicode points such as \uD834. (These cannot be converted to valid UTF-8.) * Functions nchar(), tolower(), toupper() and chartr() and those using regular expressions have more support for inputs with a marked Latin-1 encoding. * The character-classification functions used (by default) to replace the system iswxxxxx functions on Windows, macOS and AIX have been updated to Unicode 13.0.0. The character-width tables have been updated to include new assignments in Unicode 13.0.0. * The code for evaluating default (extended) regular expressions now uses the same character-classification functions as the rest of R (previously they differed on Windows, macOS and AIX). * There is a build-time option to replace the system's wide-character wctrans C function by tables shipped with R: use configure option --with-internal-towlower or (on Windows) -DUSE_RI18N_CASE in CFLAGS when building R. This may be needed to allow tolower() and toupper() to work with Unicode characters beyond the Basic Multilingual Plane where not supported by system functions (e.g. on Solaris where it is the new default). * R is more careful when truncating UTF-8 and other multi-byte strings that are too long to be printed, passed to the system or libraries or placed into an internal buffer. Truncation will no longer produce incomplete multibyte characters. DEPRECATED AND DEFUNCT: * Function plclust() from the package stats and package.dependencies(), pkgDepends(), getDepList(), installFoundDepends(), and vignetteDepends() from package tools are defunct. * Defunct functions checkNEWS() and readNEWS() from package tools and CRAN.packages() from utils have been removed. * R CMD config CXXCPP is defunct (it was deprecated in R 3.6.2). * parallel::detectCores() drops support for Irix (retired in 2013). * The LINPACK argument to chol.default(), chol2inv(), solve.default() and svd() has been defunct since R 3.1.0. It was silently ignored up to R 4.0.3 but now gives an error. * Subsetting/indexing, such as ddd[*] or ddd$x on a DOTSXP (dot-dot-dot) object ddd has been disabled; it worked by accident only and was undocumented. BUG FIXES: * Many more C-level allocations (mainly by malloc and strdup) are checked for success with suitable alternative actions. * Bug fix for replayPlot(); this was turning off graphics engine display list recording if a recorded plot was replayed in the same session. The impact of the bug became visible if resize the device after replay OR if attempted another savePlot() after replay (empty display list means empty screen on resize or empty saved plot). * R CMD check etc now warn when a package exports non-existing S4 classes or methods, also in case of no "methods" presence. (Reported by Alex Bertram; reproducible example and patch by Sebastian Meyer in PR#16662.) * boxplot() now also accepts calls for labels such as ylab, the same as plot(). (Reported by Marius Hofert.) * The help page for xtabs() now correctly states that addNA is setting na.action = na.pass among others. (Reported as PR#17770 by Thomas Soeiro.) * The R CMD check <pkg> gives a longer and more comprehensible message when DESCRIPTION misses dependencies, e.g., in Imports:. (Thanks to the contributors of PR#17179.) * update.default() now calls the generic update() on the formula to work correctly for models with extended formulas. (As reported and suggested by Neal Fultz in PR#17865.) * The horizontal position of leaves in a dendrogram is now correct also with center = FALSE. (PR#14938, patch from Sebastian Meyer.) * all.equal.POSIXt() no longer warns about and subsequently ignores inconsistent "tzone" attributes, but describes the difference in its return value (PR#17277). This check can be disabled _via_ the new argument check.tzone = FALSE as suggested by Sebastian Meyer. * as.POSIXct() now populates the "tzone" attribute from its tz argument when x is a logical vector consisting entirely of NA values. * x[[2^31]] <- v now works. (Thanks to the report and patch by Suharto Anggono in PR#17330.) * In log-scale graphics, axis() ticks and label positions are now computed more carefully and symmetrically in their range, typically providing _more_ ticks, fulfilling wishes in PR#17936. The change really corresponds to an improved axisTicks() (package grDevices), potentially influencing grid and lattice, for example. * qnorm(<very large negative>, log.p=TRUE) is now correct to at least five digits where it was catastrophically wrong, previously. * sum(df) and similar "Summary"- and "Math"-group member functions now work for data frames df with logical columns, notably also of zero rows. (Reported to R-devel by Martin "b706".) * unsplit() had trouble with tibbles due to unsound use of rep(NA, len)-indexing, which should use NA_integer_ (Reported to R-devel by Mario Annau.) * pnorm(x, log.p = TRUE) underflows to -Inf slightly later. * show(<hidden S4 generic>) prints better and without quotes for non-hidden S4 generics. * read.table() and relatives treated an "NA" column name as missing when check.names = FALSE PR#18007. * Parsing strings containing UTF-16 surrogate pairs such as "\uD834\uDD1E" works better on some (uncommon) platforms. sprintf("%X", utf8ToInt("\uD834\uDD1E")) should now give "1D11E" on all platforms. * identical(x,y) is no longer true for differing DOTSXP objects, fixing PR#18032. * str() now works correctly for DOTSXP and related exotics, even when these are doomed. Additionally, it no longer fails for lists with a class and "irregular" method definitions such that e.g. lapply(*) will necessarily fail, as currently for different igraph objects. * Too long lines in environment files (e.g. Renviron) no longer crash R. This limit has been increased to 100,000 bytes. (PR#18001.) * There is a further workaround for FreeType giving incorrect italic font faces with cairo-based graphics devices on macOS. * add_datalist(*, force = TRUE) (from package tools) now actually updates an existing data/datalist file for new content. (Thanks to a report and patch by Sebastian Meyer in PR#18048.) * cut.Date() and cut.POSIXt() could produce an empty last interval for breaks = "months" or breaks = "years". (Reported as PR#18053 by Christopher Carbone.) * Detection of the encoding of 'regular' macOS locales such as en_US (which is UTF-8) had been broken by a macOS change: fortunately these are now rarely used with en_US.UTF-8 being preferred. * sub() and gsub(pattern, repl, x, *) now keep attributes of x such as names() also when pattern is NA (PR#18079). * Time differences ("difftime" objects) get a replacement and a rep() method to keep "units" consistent. (Thanks to a report and patch by Nicolas Bennett in PR#18066.) * The \RdOpts macro, setting defaults for \Sexpr options in an Rd file, had been ineffective since R 2.12.0: it now works again. (Thanks to a report and patch by Sebastian Meyer in PR#18073.) * mclapply and pvec no longer accidentally terminate parallel processes started before by mcparallel or related calls in package parallel (PR#18078). * grep and other functions for evaluating (extended) regular expressions handle in Unicode also strings not explicitly flagged UTF-8, but flagged native when running in UTF-8 locale. * Fixed a crash in fifo implementation on Windows (PR#18031). * Binary mode in fifo on Windows is now properly detected from argument open (PR#15600, PR#18031). -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com ______________________________________________ R-devel at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel _______________________________________________ R-announce at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-announce