Thanks for reporting this issue. This is a nasty bug that we introduced recently. The crash happens after the actual sending of the feedback is done so at least you can be sure we got what you sent.
We treat each problem causing a crash or hanging of VS as critical and we have it logged for fixing with highest priority. We were able to reproduce it and it will be fixed in the next internal build that we'll release next week. You will be automatically notified once it's available.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items