Error when cloning within a clone

[Jamie Whitehouse]

First let me acknowledge that this isn't a typical Mercurial operation,
but has worked successfully in 0.9.5.

I'm using Mercurial to manage the source of a Java project built using
Maven.  Maven has a release plugin that performs tagging and produces a
clean build from a tag.  Part of that process is to checkout a clean
version from the tag into the projects build directory (Maven names this
'target').  What you wind up with is two clones, on within the other:
- the first clone being the development working directory created
manually using the command line hg tool (my-project)
- the second clone being the release build directory created by Maven
using the command line hg tool (my-project/target/checkout)

Using Mercurial 0.9.5 this worked fine but in 1.0 I get an error.
Luckily the hg command executed by Maven is shown and I've reproduced
this manually, below is the output.  The ea-server.mainstream directory
is the root of the first clone.  In this case I'm creating a release for
the installer-support sub-project and am running the Maven release
plugin from ea-server.mainstream/installer-support.  The plugin tries to
create a clone into
ea-server.mainstream/installer-support/target/checkout .  When doing so
an error occurs.

~/work/ea/mainstream/ea-server.mainstream/installer-support$ hg clone -r
installer-support-2.9.0.0.0_build3
http://hg/ea/mainstream/ea-server.mainstream /home/jwhitehouse/work/ea/mainstream/ea-server.mainstream/installer-support/target/checkout
requesting all changes
adding changesets
adding manifests
adding file changes
added 2681 changesets with 13344 changes to 3741 files
updating working directory
Traceback (most recent call last):
  File "/usr/bin/hg", line 20, in <module>
    mercurial.dispatch.run()
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line
20, in run
    sys.exit(dispatch(sys.argv[1:]))
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line
29, in dispatch
    return _runcatch(u, args)
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line
93, in _runcatch
    ui.warn(_("abort: %s\n") % inst[1])
IndexError: tuple index out of range

My environment is Ubuntu 8.04 (Hardy) using the Debian Lenny packages
(http://packages.debian.org/lenny/mercurial).  Other common Mercurial
operations have been successful.

If I perform the same clone to a temporary location without being in an
existing repository it works (as expected), but this isn't feasible for
the Maven release plugin.

~/work/ea/mainstream/ea-server.mainstream/installer-support$ hg clone -r
installer-support-2.9.0.0.0_build3
http://hg/ea/mainstream/ea-server.mainstream /tmp/checkoutrequesting all
changes
adding changesets
adding manifests
adding file changes
added 2681 changesets with 13344 changes to 3741 files
updating working directory
1897 files updated, 0 files merged, 0 files removed, 0 files unresolved


					
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