A segfault is a bug. Unfortunately I can not reproduce it on my 14.04 system.
** Information type changed from Public Security to Public -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1377025 Title: twice 'apt-mark hold package' to same package crashed Status in “apt” package in Ubuntu: Invalid Bug description: # apt-mark hold acpid acpid set on hold. And one more # apt-mark hold acpid acpid was already set on hold. Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1377025/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp