Update

cran.r-project.org/web/checks/check_flavors.html

@@ -10,7 +10,7 @@
 <div class="container">
 <h2>CRAN Package Check Flavors</h2>
 <p>
-Last updated on 2024-12-08 03:49:32 CET.
+Last updated on 2024-12-10 03:49:16 CET.
 </p>
 <p>
 Systems used for CRAN package checking.

cran.r-project.org/web/checks/check_issue_kinds.html

@@ -10,7 +10,7 @@
 <div class="container">
 <h2>CRAN Package Check Issue Kinds</h2>
 <p>
-Last updated on 2024-12-08 03:49:32 CET.
+Last updated on 2024-12-10 03:49:16 CET.
 </p>
 <table border="1">
 <tr> <th> Kind </th> <th> Description </th> <th> Details </th> </tr>
@@ -29,11 +29,13 @@ <h2>CRAN Package Check Issue Kinds</h2>
 <tr id="gcc-ASAN"> <td> gcc-ASAN </td> <td> Tests of memory access errors using AddressSanitizer </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/memtests/README.txt"> Details </a> </td> </tr>
 <tr id="gcc-UBSAN"> <td> gcc-UBSAN </td> <td> Tests of memory access errors using Undefined Behavior Sanitizer </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/memtests/README.txt"> Details </a> </td> </tr>
 <tr id="gcc"> <td> gcc </td> <td> Installation issues with fedora-gcc but not fedora-clang </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/gcc/README.txt"> Details </a> </td> </tr>
+<tr id="gcc19"> <td> gcc19 </td> <td> Installation checks with a snapshot of GCC pre-15 </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/gcc15/README.txt"> Details </a> </td> </tr>
 <tr id="noLD"> <td> noLD </td> <td> Tests without long double </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/noLD/README.txt"> Details </a> </td> </tr>
 <tr id="noOMP"> <td> noOMP </td> <td> Tests without OpenMP support </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/noOMP/README.txt"> Details </a> </td> </tr>
 <tr id="noRemap"> <td> noRemap </td> <td> Checks with -DR_NO_REMAP used for C++ code </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/noRemap/README.txt"> Details </a> </td> </tr>
 <tr id="noSuggests"> <td> noSuggests </td> <td> Tests without suggested packages </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/noSuggests/README.txt"> Details </a> </td> </tr>
 <tr id="valgrind"> <td> valgrind </td> <td> Tests of memory access errors using valgrind </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/memtests/README.txt"> Details </a> </td> </tr>
+<tr id="0len"> <td> 0len </td> <td> Tests for zero-length access segfaults </td> <td> <a href="../../../www.stats.ox.ac.uk/pub/bdr/0len/README.txt"> Details </a> </td> </tr>
 <tr id="rchk"> <td> rchk </td> <td> Checks of native code (C/C++) based on static code analysis </td> <td> <a href="../../../raw.githubusercontent.com/kalibera/cran-checks/master/rchk/README.txt"> Details </a> </td> </tr>
 <tr id="rcnst"> <td> rcnst </td> <td> Checks of corruption of constants </td> <td> <a href="../../../raw.githubusercontent.com/kalibera/cran-checks/master/rcnst/README.txt"> Details </a> </td> </tr>
 <tr id="rlibro"> <td> rlibro </td> <td> Checks with read-only user library </td> <td> <a href="../../../raw.githubusercontent.com/kalibera/cran-checks/master/rlibro/README.txt"> Details </a> </td> </tr>

www.stats.ox.ac.uk/pub/bdr/0len/README.txt

@@ -0,0 +1,42 @@
+As fedora-gcc,
+
+https://www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-gcc
+
+but without the DEFS line and so using C99 inlining semantics.
+
+We know
+corrplot and treeheatr are from seriation
+Evacluster and plotmm are from EMCluster
+TraMineRextras is from TraMine
+fedmatch appears to be from stringdist
+grainscape and multilaterals are from igraph
+marquee is from textshaping by the same maintainer
+networkLite is from network
+shipunov is from ape and has been reported there
+simputation is from gower by the same maintainer
+
+Subdirectory 'docker' contains the script for a docker container that has been
+used on an x86_64 machine to reproduce most of these. (On Linux but docker
+in prinicple also works on Windows and Intel or Apple Silicon macOS.)
+See its comments for how to use it.
+
+Beware that if you have customizations in e.g. ~/.R/Makeconf these may
+well negate the ability to reproduce the segfaults.
+
+
+Alternatively
+-------------
+
+Many of the issues are from passing as.double(NULL) or as.integer(NULL)
+to .C or .Fortran where the compiled code expects to be pased a vector
+of lemgth at least one.
+
+If R-devel is compiled with 
+
+-DR_LESS_COERCION_FROM_NULL
+
+(for exaxmple by setting DEFS in config.site to this), then these become 
+errors and the traceback on error will almost always pinpoint the 
+(first) issue.  Logs from this approach are in subdirectory Alternative.
+(Such calls could perhaps be legitimate, but most are a problem.)
+

www.stats.ox.ac.uk/pub/bdr/gcc15/README.txt

@@ -0,0 +1,15 @@
+Installation checks with a snapshot of GCC pre-15.
+This defaults the C compiler to -std=gnu23.
+The current description of changes is
+
+https://gcc.gnu.org/gcc-15/changes.html
+
+this does not include the change in default C standard!
+
+See also
+
+https://gcc.gnu.org/gcc-15/porting_to.html
+
+Other details as https://www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-gcc
+
+Debian unstable and Ubuntu have a package 'gcc-snapshot'.

www.stats.ox.ac.uk/pub/bdr/memtests/README.txt

@@ -58,7 +58,7 @@ as discussed in 'Writing R Extensions'.
 
 gcc-ASAN, gcc-UBSAN:
 gcc 14.1 with config.site:
-CC=gcc-14
+CC="gcc-14 -fsanitize=address,undefined,bounds-strict -fno-omit-frame-pointer"
 CXX="g++-14 -fsanitize=address,undefined,bounds-strict -fno-omit-frame-pointer"
 CFLAGS="-g -O2 -Wall -pedantic -mtune=native -fsanitize=address -Wp,-D_FORTIFY_SOURCE=3"
 FC=gfortran-14