[Bug 5872] New: bundle with cache:rev-branch-cache can't be applied by hg <=4.5.2

[mercurial-bugs at mercurial-scm.org]

https://bz.mercurial-scm.org/show_bug.cgi?id=5872

            Bug ID: 5872
           Summary: bundle with cache:rev-branch-cache can't be applied by
                    hg <=4.5.2
           Product: Mercurial
           Version: 4.6
          Hardware: PC
                OS: Linux
            Status: UNCONFIRMED
          Severity: bug
          Priority: wish
         Component: bundle2
          Assignee: bugzilla at mercurial-scm.org
          Reporter: zash at zash.se
                CC: mercurial-devel at mercurial-scm.org,
                    pierre-yves.david at ens-lyon.org

Created attachment 2006
  --> https://bz.mercurial-scm.org/attachment.cgi?id=2006&action=edit
Report from a user on hg 4.3.1

$ hg up 4.6
$ make local
$ ./hg bundle --base --all hg.bundle
$ hg up 4.5.3
$ make local
$ ./hg unbundle hg.bundle

abort: hg.bundle-zstd-v2: unknown bundle feature, cache:rev-branch-cache
(see https://mercurial-scm.org/wiki/BundleFeature for more information)

This also produces a nasty traceback when used as clonebundles, see attached
log from a user.

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