tags: don't read .hgtags fnodes from tags cache files Now that we have a standalone and shared cache for .hgtags fnodes, the .hgtags fnodes stored in the tags cache files are redundant. Upcoming patches will change the format of the tags cache files to remove this data and to improve the validation. To prepare for this, we change the tags reading code to ignore all but the tip .hgtags fnodes entries in existing tags cache files. All fnodes lookups now go through our new shared cache, which is why test output changed. Format of tags cache files has not yet changed.

rebase: restore bookmark state on abort The bookmark state was already being preserved, but it wasn't being properly restored.

histedit: store backup file before histedit It's possible for the user to delete some of the commits they started with during a histedit, and aborting the histedit doesn't bring them back. Let's store a backup bundle so we can always recover the stack of commits from before they began.

histedit: replace pickle with custom serialization Pickle is undesirable, so let's serialize it ourselves. We keep the ability to parse existing pickle blobs for now.

devel-warn: add a prefix to all messages ("devel-warn: ") We want to make the origin and importance of the message clear to developers.

push: acquire local 'wlock' if "pushback" is expected (BC) (issue4596) If the client allows "pushback", the bundle2 served back by the server may contains parts that will write to the repository. Such parts may require the 'wlock' (eg: bookmark) so we acquire it in advance to make sure it got acquired before the 'lock'.

annotate: always prepare ancestry context of base fctx (issue4600) This patch extends the workaround introduced by dd01834a696f. Even if the base fctx is the same as intorrev, _ancestrycontext must be built for faster _changeid lookup. repo: https://hg.mozilla.org/releases/mozilla-beta command: hg annotate -r 4954faa47dd0 gfx/thebes/gfxWindowsPlatform.cpp before: 52.450 sec after: 1.820 sec