revlog: clear revision cache on hash verification failure...
revlog: clear revision cache on hash verification failure
The revision cache is populated after raw revision fulltext is
retrieved but before hash verification. If hash verification
fails, the revision cache will be populated and subsequent
operations to retrieve the invalid fulltext may return the cached
fulltext instead of raising.
This commit changes hash verification so it will invalidate the
revision cache if the cached node fails hash verification. The
side-effect is that subsequent operations to request the revision
text - even the raw revision text - will always fail.
The new behavior is consistent and is definitely less wrong. There
is an open question of whether revision(raw=True) should validate
hashes. But I'm going to punt on this problem. We can always change
behavior later. And to be honest, I'm not sure we should expose
raw=True on the storage interface at all. Another day...
Differential Revision:
https://phab.mercurial-scm.org/D4867
