Please consider this question for a moment:
I feel like it would be appropriate to edit the question so that the title and tags don't mislead. Both of those would seem to indicate that this is a question about concurrency, but in fact this question is about a compiler error. So, my idea is to change the question to "Why am I getting this compiler error?" and change the tags appropriately.
As I'm new to being able to edit questions, I'd just like to know if this seems reasonable to the community before I go ahead and do it.