/var/crash/ - should I send it?

Send it. The bug tracker is rather good at cleaning itself from dupes and incomplete bugs (or the maintainer of that bug is).

There is a very high chance it will get rejected as it will only accept crash report for 1 problem. (I hope) you will get added to the "I am affected too" if you have a launchpad account connected. Otherwise: log into your launchpad account and do that yourself. That way you did your (albeit small) part in helping.

If it does go through it does need attention and others could expand on this error.

Related:

• What happens after `ubuntu-bug` has done its thing?