From: Jamal Hadi Salim <j...@mojatatu.com> Date: Thu, 20 Apr 2017 09:27:00 -0400
> The issue Jiri is bringing up is unrelated. He is talking about > a bitmap and conflating it with a data structure. They are not > the same issue. Bitmaps can have the same exact problem as padding if we didn't code it correctly. The issue is _purely_, "did we check unused 'fields' and enforce them to be a certain value" If not, we lose, and can't use those "fields" in the future. This rule applies whether you are speaking about padding or a bitmask.
