Rather than just asserting some invariants are true, report errors if they aren't. Change-Id: Id361b8a13011e1a75289ddddb6b41c1d09dbf794 Reviewed-on: https://gem5-review.googlesource.com/c/13296 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>