It was one of them. However, given the other writing/talks Facebook has put out about their usage of Haskell and Haxl, Go is probably not a good fit for their use case due to language expressivity concerns (not declarative enough, not enough type safety, not syntactically flexible enough for writing DSLs).
It "solves" it by not doing any of the things that you'd expect a modern language's compiler to do.
In my opinion the time wasted debugging Go issues that could have been statically prevented is better spent waiting for a slightly longer compile cycle to finish.