bug#79299: nproc-quota test failure

Today's CI run produces a
  FAIL: tests/nproc/nproc-quota
on CentOS 7 and on Alpine Linux.

Here are the two relevant log file portions.


CentOS 7:

FAIL: tests/nproc/nproc-quota
=============================

++ initial_cwd_=/work/coreutils-2025-08-24/build
+++ testdir_prefix_
+++ printf gt
++ pfx_=gt
+++ mktempd_ /work/coreutils-2025-08-24/build gt-nproc-quota.sh.XXXX
+++ case $# in
+++ destdir_=/work/coreutils-2025-08-24/build
+++ template_=gt-nproc-quota.sh.XXXX
+++ MAX_TRIES_=4
+++ case $destdir_ in
+++ destdir_slash_=/work/coreutils-2025-08-24/build/
+++ case $template_ in
++++ unset TMPDIR
+++ d=/work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
+++ case $d in
+++ :
+++ test -d /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
++++ ls -dgo /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
+++ perms='drwx------ 2 4096 Aug 24 06:57 /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl'
+++ case $perms in
+++ :
+++ echo /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
+++ return
++ test_dir_=/work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
++ cd /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
++ case $srcdir in
++ srcdir=../..
++ builddir=..
++ export srcdir builddir
++ gl_init_sh_nl_='
'
++ IFS=' 	
'
++ for sig_ in 1 2 3 13 15
+++ expr 1 + 128
++ eval 'trap '\''Exit 129'\'' 1'
+++ trap 'Exit 129' 1
++ for sig_ in 1 2 3 13 15
+++ expr 2 + 128
++ eval 'trap '\''Exit 130'\'' 2'
+++ trap 'Exit 130' 2
++ for sig_ in 1 2 3 13 15
+++ expr 3 + 128
++ eval 'trap '\''Exit 131'\'' 3'
+++ trap 'Exit 131' 3
++ for sig_ in 1 2 3 13 15
+++ expr 13 + 128
++ eval 'trap '\''Exit 141'\'' 13'
+++ trap 'Exit 141' 13
++ for sig_ in 1 2 3 13 15
+++ expr 15 + 128
++ eval 'trap '\''Exit 143'\'' 15'
+++ trap 'Exit 143' 15
++ saved_IFS=' 	
'
++ IFS=:
++ new_PATH=
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /work/coreutils-2025-08-24/build/src/.
++ new_PATH=/work/coreutils-2025-08-24/build/src
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /usr/local/sbin/.
++ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /usr/local/bin/.
++ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /usr/sbin/.
++ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /usr/bin/.
++ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /sbin/.
++ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin
++ for dir in '$PATH'
++ IFS=' 	
'
++ case "$dir" in
++ test -d /bin/.
++ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
++ IFS=' 	
'
++ PATH=/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
++ export PATH
++ trap remove_tmp_ EXIT
+ path_prepend_ ./src
+ test 1 '!=' 0
+ path_dir_=./src
+ case $path_dir_ in
+ abs_path_dir_=/work/coreutils-2025-08-24/build/./src
+ case $abs_path_dir_ in
+ PATH=/work/coreutils-2025-08-24/build/./src:/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ create_exe_shims_ /work/coreutils-2025-08-24/build/./src
+ case $EXEEXT in
+ return 0
+ shift
+ test 0 '!=' 0
+ export PATH
+ print_ver_ nproc
+ require_built_ nproc
+ skip_=no
+ for i in '"$@"'
+ case " $built_programs " in
+ test no = yes
+ test yes = yes
+ local i
+ for i in '$*'
+ env nproc --version
nproc (GNU coreutils) 2025-08-24
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Giuseppe Scrivano.
+ require_root_
+ uid_is_privileged_
++ id -u
+ my_uid=0
+ case $my_uid in
+ NON_ROOT_USERNAME=nobody
++ id -g nobody
+ NON_ROOT_GID=99
+ grep '^[ ]*chroot' ../../tests/nproc/nproc-quota.sh
chroot $ROOT /nproc --version ||
+ nonroot_has_perm_
+ require_built_ chroot
+ skip_=no
+ for i in '"$@"'
+ case " $built_programs " in
+ test no = yes
++ chroot --skip-chdir --user=nobody / env PATH=/work/coreutils-2025-08-24/build/./src:/work/coreutils-2025-08-24/build/src:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin rm --version
++ sed -n '1s/.* //p'
+ local rm_version=2025-08-24
+ case ":$rm_version:" in
+ ROOT=cgroup
+ mkdir -p cgroup/proc/self
+ mkdir -p cgroup/sys/fs/cgroup/foo
+ touch cgroup/sys/fs/cgroup/cgroup.controllers
+ echo 0::/foo
+ echo 'max 100000'
+ nproc=/work/coreutils-2025-08-24/build/src/nproc
++ ldd /work/coreutils-2025-08-24/build/src/nproc
++ grep -o '/[^ ]*'
+ cp --parents /lib64/libc.so.6 /lib64/ld-linux-x86-64.so.2 cgroup
+ cp /work/coreutils-2025-08-24/build/src/nproc cgroup
+ chroot cgroup /nproc --version
nproc (GNU coreutils) 2025-08-24
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Giuseppe Scrivano.
+ unset OMP_NUM_THEADS
+ unset OMP_THREAD_LIMIT
++ nproc
+ ncpus=4
++ nproc --all
+ test 4 = 4
+ echo 'max 100000'
++ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '1000000 1'
++ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '100000 0'
++ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '100000 100000'
++ OMP_NUM_THREADS=4
++ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '40000 100000'
++ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '50000 100000'
++ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '100000 100000'
++ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '140000 100000'
++ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '1 1000000'
++ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ test 4 -gt 1
+ echo '150000 100000'
++ chroot cgroup /nproc
+ test 4 -eq 2
+ fail=1
+ echo '150000 100000'
++ OMP_THREAD_LIMIT=10
++ chroot cgroup /nproc
+ test 4 -eq 2
+ fail=1
+ Exit 1
+ set +e
+ exit 1
+ exit 1
+ remove_tmp_
+ __st=1
+ cleanup_
+ :
+ test '' = yes
+ cd /work/coreutils-2025-08-24/build
+ chmod -R u+rwx /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
+ rm -rf /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.qFEl
+ exit 1
FAIL tests/nproc/nproc-quota.sh (exit status: 1)


Alpine Linux:

FAIL: tests/nproc/nproc-quota
=============================

+ initial_cwd_=/work/coreutils-2025-08-24/build
+ testdir_prefix_
+ printf gt
+ pfx_=gt
+ mktempd_ /work/coreutils-2025-08-24/build gt-nproc-quota.sh.XXXX
+ destdir_=/work/coreutils-2025-08-24/build
+ template_=gt-nproc-quota.sh.XXXX
+ MAX_TRIES_=4
+ destdir_slash_=/work/coreutils-2025-08-24/build/
+ unset TMPDIR
+ d=/work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ :
+ test -d /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ ls -dgo /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ perms='drwx------ 2 4096 Aug 24 06:57 /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx'
+ :
+ echo /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ return
+ test_dir_=/work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ cd /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ srcdir=../..
+ builddir=..
+ export srcdir builddir
+ gl_init_sh_nl_='
'
+ IFS=' 	
'
+ expr 1 + 128
+ eval 'trap '"'"'Exit 129'"'"' 1'
+ trap 'Exit 129' 1
+ expr 2 + 128
+ eval 'trap '"'"'Exit 130'"'"' 2'
+ trap 'Exit 130' 2
+ expr 3 + 128
+ eval 'trap '"'"'Exit 131'"'"' 3'
+ trap 'Exit 131' 3
+ expr 13 + 128
+ eval 'trap '"'"'Exit 141'"'"' 13'
+ trap 'Exit 141' 13
+ expr 15 + 128
+ eval 'trap '"'"'Exit 143'"'"' 15'
+ trap 'Exit 143' 15
+ saved_IFS=' 	
'
+ IFS=:
+ new_PATH=
+ IFS=' 	
'
+ test -d /work/coreutils-2025-08-24/build/src/.
+ new_PATH=/work/coreutils-2025-08-24/build/src
+ IFS=' 	
'
+ test -d /usr/local/bin/.
+ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/bin
+ IFS=' 	
'
+ test -d /usr/sbin/.
+ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin
+ IFS=' 	
'
+ test -d /usr/bin/.
+ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin:/usr/bin
+ IFS=' 	
'
+ test -d /sbin/.
+ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin:/usr/bin:/sbin
+ IFS=' 	
'
+ test -d /bin/.
+ new_PATH=/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ IFS=' 	
'
+ PATH=/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ export PATH
+ trap remove_tmp_ EXIT
+ path_prepend_ ./src
+ test 1 '!=' 0
+ path_dir_=./src
+ abs_path_dir_=/work/coreutils-2025-08-24/build/./src
+ PATH=/work/coreutils-2025-08-24/build/./src:/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ create_exe_shims_ /work/coreutils-2025-08-24/build/./src
+ return 0
+ shift
+ test 0 '!=' 0
+ export PATH
+ print_ver_ nproc
+ require_built_ nproc
+ skip_=no
+ test no '=' yes
+ test yes '=' yes
+ local i
+ env nproc --version
nproc (GNU coreutils) 2025-08-24
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Giuseppe Scrivano.
+ require_root_
+ uid_is_privileged_
+ id -u
+ my_uid=0
+ NON_ROOT_USERNAME=nobody
+ id -g nobody
+ NON_ROOT_GID=65534
+ grep '^[ ]*chroot' ../../tests/nproc/nproc-quota.sh
chroot $ROOT /nproc --version ||
+ nonroot_has_perm_
+ require_built_ chroot
+ skip_=no
+ test no '=' yes
+ chroot --skip-chdir '--user=nobody' / env 'PATH=/work/coreutils-2025-08-24/build/./src:/work/coreutils-2025-08-24/build/src:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' rm --version
+ sed -n '1s/.* //p'
+ local 'rm_version=2025-08-24'
+ ROOT=cgroup
+ mkdir -p cgroup/proc/self
+ mkdir -p cgroup/sys/fs/cgroup/foo
+ touch cgroup/sys/fs/cgroup/cgroup.controllers
+ echo 0::/foo
+ echo 'max 100000'
+ nproc=/work/coreutils-2025-08-24/build/src/nproc
+ ldd /work/coreutils-2025-08-24/build/src/nproc
+ grep -o '/[^ ]*'
+ cp --parents /lib/ld-musl-x86_64.so.1 /lib/ld-musl-x86_64.so.1 cgroup
cp: warning: source file '/lib/ld-musl-x86_64.so.1' specified more than once
+ cp /work/coreutils-2025-08-24/build/src/nproc cgroup
+ chroot cgroup /nproc --version
nproc (GNU coreutils) 2025-08-24
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Giuseppe Scrivano.
+ unset OMP_NUM_THEADS
+ unset OMP_THREAD_LIMIT
+ nproc
+ ncpus=4
+ nproc --all
+ test 4 '=' 4
+ echo 'max 100000'
+ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '1000000 1'
+ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '100000 0'
+ chroot cgroup /nproc
+ test 4 -eq 4
+ echo '100000 100000'
+ OMP_NUM_THREADS=4 chroot cgroup /nproc
+ test 4 -eq 4
+ echo '40000 100000'
+ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '50000 100000'
+ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '100000 100000'
+ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '140000 100000'
+ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ echo '1 1000000'
+ chroot cgroup /nproc
+ test 4 -eq 1
+ fail=1
+ test 4 -gt 1
+ echo '150000 100000'
+ chroot cgroup /nproc
+ test 4 -eq 2
+ fail=1
+ echo '150000 100000'
+ OMP_THREAD_LIMIT=10 chroot cgroup /nproc
+ test 4 -eq 2
+ fail=1
+ Exit 1
+ set +e
+ exit 1
+ exit 1
+ remove_tmp_
+ __st=1
+ cleanup_
+ :
+ test  '=' yes
+ cd /work/coreutils-2025-08-24/build
+ chmod -R u+rwx /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ rm -rf /work/coreutils-2025-08-24/build/gt-nproc-quota.sh.QObx
+ exit 1
FAIL tests/nproc/nproc-quota.sh (exit status: 1)