Hit:1 http://archive.ubuntukylin.com:10006/ubuntukylin trusty InRelease? ? ? ??

Hit:2 http://security.ubuntu.com/ubuntu xenial-security InRelease? ? ? ? ? ? ??

Hit:3 http://us.archive.ubuntu.com/ubuntu xenial InRelease? ? ? ? ? ? ? ? ? ? ?

Hit:4 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease

Get:5 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]

Fetched 102 kB in 7s (13.3 kB/s)? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

*** Error in `appstreamcli': double free or corruption (fasttop): 0x00000000017ceae0 ***

這是什么情況呀？