Unlucky naming top/bottom for stack bounds, has nothing to do with real
stack top. So top > botton is here, and opposite of
9be8892908d49c19fd6c9fc930d0f41276c3e345 assumption.
This is minimal fix in case cherry-picks is needed. Naming fix and
testing (if possible) will be in followup patches.
Introduced in 9be8892908d49c19fd6c9fc930d0f41276c3e345.
Can't symply reverted 9be8892908d49c19fd6c9fc930d0f41276c3e345 as
it fixes ~10 year old bug, accidentally exposed by
a8bef8865e4a4226ee608df327fddd380870c620.
515c435e37