While running the coreutils testsuite on my oldish Debian desktop with
a somewhat heavy load and several bleeding-edge tools in PATH, I've
encountered this failure in the 'tests/misc/timeout-group.sh' test:

  ++ initial_cwd_=/devel/bleeding/src/coreutils
  ++ fail=0
  +++ testdir_prefix_
  +++ printf gt
  ++ pfx_=gt
  +++ mktempd_ /devel/bleeding/src/coreutils gt-timeout-group.sh.XXXX
  +++ case $# in
  +++ destdir_=/devel/bleeding/src/coreutils
  +++ template_=gt-timeout-group.sh.XXXX
  +++ MAX_TRIES_=4
  +++ case $destdir_ in
  +++ case $template_ in
  ++++ unset TMPDIR
  +++ d=/devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  +++ case $d in
  +++ test -d /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  ++++ ls -dgo /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  ++++ tr S -
  +++ perms='drwx------ 2 4096 Dec 14 18:17 /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ'
  +++ case $perms in
  +++ test 0 = 0
  +++ echo /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  +++ return
  ++ test_dir_=/devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  ++ cd /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  ++ 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
  ++ trap remove_tmp_ 0
  + path_prepend_ ./src
  + test 1 '!=' 0
  + path_dir_=./src
  + case $path_dir_ in
  + abs_path_dir_=/devel/bleeding/src/coreutils/./src
  + case $abs_path_dir_ in
  + PATH=/devel/bleeding/src/coreutils/./src:/devel/bleeding/src/coreutils/src:/usr/local/bleeding/bin:/usr/local/bleeding/sbin:/home/stefano/bin/local:/home/stefano/bin:/usr/local/bin:/opt/bin:/usr/lib/jvm/java-6-sun-1.6.0.26/bin:/usr/games:/usr/bin:/usr/sbin:/bin:/sbin
  + create_exe_shims_ /devel/bleeding/src/coreutils/./src
  + case $EXEEXT in
  + return 0
  + shift
  + test 0 '!=' 0
  + export PATH
  + print_ver_ timeout
  + test yes = yes
  + local i
  + for i in '$*'
  + env timeout --version
  timeout (GNU coreutils) 8.20.63-4f62d
  Copyright (C) 2012 Free Software Foundation, Inc.
  License GPLv3+: GNU GPL version 3 or later <http://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 Padraig Brady.
  + setsid true
  + cat
  + chmod a+x timeout.cmd
  + cat
  + chmod a+x group.sh
  + setsid ./group.sh
  + retry_delay_ check_timeout_cmd_running .1 6
  + local test_func=check_timeout_cmd_running
  + local init_delay=.1
  + local max_n_tries=6
  + local attempt=1
  + local num_sleeps=1
  + local time_fail
  + test 1 -le 6
  ++ gawk -v n=1 -v s=.1 'BEGIN { print s * n }'
  + local delay=0.1
  + check_timeout_cmd_running 0.1
  + local delay=0.1
  + test -e timeout.running
  + time_fail=0
  + break
  + test 0 = 0
  + env kill -INT -- -28937
  + wait
  + test -e int.received
  + fail=1
  + rm -f int.received timeout.running
  ++ date +%s
  + start=1355505442
  + timeout -sALRM 30 timeout -sINT 25 ./timeout.cmd 20
  + pid=28946
  + retry_delay_ check_timeout_cmd_running .1 6
  + local test_func=check_timeout_cmd_running
  + local init_delay=.1
  + local max_n_tries=6
  + local attempt=1
  + local num_sleeps=1
  + local time_fail
  + test 1 -le 6
  ++ gawk -v n=1 -v s=.1 'BEGIN { print s * n }'
  + local delay=0.1
  + check_timeout_cmd_running 0.1
  + local delay=0.1
  + test -e timeout.running
  + time_fail=0
  + break
  + test 0 = 0
  + kill -ALRM 28946
  + wait 28946
  + ret=124
  + test 124 -eq 124
  + test -e int.received
  ++ date +%s
  + end=1355505442
  ++ expr 1355505442 - 1355505442
  + test 0 -lt 20
  + Exit 1
  + set +e
  + exit 1
  + exit 1
  + remove_tmp_
  + __st=1
  + cleanup_
  + :
  + cd /devel/bleeding/src/coreutils
  + chmod -R u+rwx /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  + rm -rf /devel/bleeding/src/coreutils/gt-timeout-group.sh.ZyEZ
  + exit 1

Attached is the corresponding config.log (compressed).

I've not investigated further.  Let me know if you need more information.

Regards,
  Stefano