On CentOS 6, there is a test failure:

FAIL: tests/tail/tail-c.sh

Log is attached. The command that fails is:

  timeout --verbose 1 tail -c 4096 /dev/urandom

And indeed, I can reproduce it manually:

  $ timeout --verbose 1 src/tail -c 4096 /dev/urandom
  timeout: Unrecognized option '--verbose'
  Try `timeout --help' for more information.

  $ src/timeout --verbose 1 src/tail -c 4096 /dev/urandom
  timeout: sending signal TERM to command 'src/tail'
  $ echo $?
  124