[Bug 1313784] [NEW] File descriptors leaked on lvs invocation

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While upgrading to Kubuntu 14.04 yesterday, I got the following error
messages over and over again:

Generating grub configuration file ...^M
File descriptor 3 (pipe:[4852522]) leaked on vgs invocation. Parent PID 6438: grub-probe^M
File descriptor 59 (/var/log/dist-upgrade/apt.log) leaked on vgs invocation. Parent PID 6438: grub-probe^M


The file descriptors appeared random, and the "Parent PID" was either /bin/sh, grub-install, grub-probe or /usr/sbin/grub-probe:
grep leaked ./dist-upgrade/apt-term.log |sed 's/.*Parent PID [0-9]*: //' | sort  | uniq -c
     53 /bin/sh
     72 grub-install
    106 grub-probe
   1484 /usr/sbin/grub-probe

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New

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File descriptors leaked on lvs invocation
https://bugs.launchpad.net/bugs/1313784
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