[pkg-fso-maint] Bug#853016: even stops apt

[積丹尼 Dan Jacobson]

severity 853016 grave
thanks
In fact, you terminate the window the aptitude upgrade was running.
The next time the user runs apt/aptitude, he will be met with
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem. 
W: Could not lock the cache file; this usually means that dpkg or another apt tool is already installing packages.  Opening in read-only mode; any changes you make to the states of packages will NOT be preserved!
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.