[Bug 1284756] Re: debuild sometimes hangs on tee

[Dan Kegel]

Happened again, this time in an ubuntu 10.04.4 guest.
Aaaand.... guess what?  The other end of the pipe is the stdout and stderr from some random daemon process started by a unit test!
Evidently, my unit tests need to clean up after themselves better.

Marking invalid.

** Changed in: devscripts (Ubuntu)
       Status: New => Invalid

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Title:
  debuild sometimes hangs on tee

Status in “devscripts” package in Ubuntu:
  Invalid

Bug description:
  On Ubuntu 12.04.2 in an lxc container, twice now I've caught
     debuild -b -uc -us -kfoo at bar > world.log 2>&1
  in the act of hanging after printing the line 'Finished running lintian.'.
  In both cases, killing the 'tee' process let the process finish.

  Here's what I saw this time with ps:

  buildbot  1874  0.0  0.0  35716  4764 pts/3    S+   08:57   0:00 /usr/bin/perl /usr/bin/debuild --preserve-envvar=GTEST_FILTER -b -uc -us -kbuildtools at oblong.com -j4
  buildbot  1917  0.0  0.0   4312   144 pts/3    S+   08:57   0:00 tee ../mezzanine2.11_2.11-95_amd64.build

  buildbot at ubu1204-test:~/src/ob-repobot$ ls -l /proc/1874/fd
  total 0
  lrwx------ 1 buildbot buildbot 64 Feb 25 15:17 0 -> /dev/pts/3
  l-wx------ 1 buildbot buildbot 64 Feb 25 15:17 3 -> /home/buildbot/src/ob-repobot/world.log
  l-wx------ 1 buildbot buildbot 64 Feb 25 15:17 4 -> /home/buildbot/src/ob-repobot/world.log

  buildbot at ubu1204-test:~/src/ob-repobot$ ls -l /proc/1917/fd
  total 0
  lr-x------ 1 buildbot buildbot 64 Feb 25 15:17 0 -> pipe:[14619794]
  l-wx------ 1 buildbot buildbot 64 Feb 25 15:17 1 -> /home/buildbot/src/ob-repobot/world.log
  l-wx------ 1 buildbot buildbot 64 Feb 25 15:14 2 -> /home/buildbot/src/ob-repobot/world.log
  l-wx------ 1 buildbot buildbot 64 Feb 25 15:17 3 -> /home/buildbot/src/mezzanine2.11_2.11-95_amd64.build

  $ tail -n 1 /home/buildbot/src/ob-repobot/world.log
  Finished running lintian.

  It's a bit of a mystery.  I guess I should find out what's got the
  other end of the pipe open next time?

  Maybe I should add prints to /usr/bin/debuild.pl; there aren't many lines between where that message
  is printed (line 1251) and where the script exits (line 1304).

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