Do the overlay consistency checks separate from constructing
the overlay data structure. This makes sure that the data structure
can be changed without worrying about losing the checks.
Change-Id: I9ff50cc366b5362adc5570f94e6caf646ddf5046
Reviewed-on: https://go-review.googlesource.com/c/go/+/628700
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Matloob <matloob@golang.org>