I am also experiencing this. Seems like debian already fixed it:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=777559
If I do not have aufs-tools installed, docker complains:
Jul 21 17:59:25 c7-n2b43-cibuild dockerd[22858]:
time="2017-07-21T17:59:25.392652902-06:00" level=warning
** Changed in: aufs-tools (Ubuntu)
Importance: Undecided => Medium
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Title:
auplink segfaults during docker engine startup
To manage
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: aufs-tools (Ubuntu)
Status: New => Confirmed
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Title:
** Attachment added: "journal.txt"
https://bugs.launchpad.net/ubuntu/+source/aufs-tools/+bug/1607298/+attachment/4708650/+files/journal.txt
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** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/aufs-tools/+bug/1607298/+attachment/4708649/+files/dmesg.txt
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