[Bug 4528] New: clone -u <branch> -r <cset> updates to branchpoint

[mercurial-bugs at selenic.com]

http://bz.selenic.com/show_bug.cgi?id=4528

          Priority: normal
            Bug ID: 4528
                CC: mercurial-devel at selenic.com
          Assignee: bugzilla at selenic.com
           Summary: clone -u <branch> -r <cset> updates to branchpoint
          Severity: bug
    Classification: Unclassified
                OS: Other
          Reporter: danek.duvall at oracle.com
          Hardware: PC
            Status: UNCONFIRMED
           Version: 3.2.3
         Component: Mercurial
           Product: Mercurial

With a repo built from the following DAG:

    +2
    @"branchA"+3
    @default*4+1

if I then run

    hg clone -r 3 -u branchA small smallchild

(where changeset 3 is the middle of the three changesets on branchA), then
smallchild will have the first two changesets on default, and the first two
changesets on branchA, as expected.  However, the working directory parent will
be set to changeset 1 -- the last changeset on default.  I would expect it to
be changeset 3, as per the -u argument, asking for branchA to be checked out
(where I'd expect the tipmost changeset).

I could understand if -r and -u referenced different branches (-r 6 -u branchA)
that it wouldn't know what to do, but that's not the case here (and trying that
doesn't even give a warning that it makes no sense).

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