Ctrl-C'ing a push operation == pain

I was bzr push'ing up a branch. It had taken about 30 minutes and wasn't seeming to do much, so I hit Ctrl-C with the intent to restart the push and see if things turned out better. When I Ctrl-C'd, I got the following output:

Exception exceptions.OSError: <exceptions.OSError instance at 0x30e07e90> in <bound method SFTPFile.__del__ of <paramiko.SFTPFile object at 0x30eb7950>> ignored
bzr: ERROR: exceptions.OSError: [Errno 32] Broken pipe
  at /usr/lib/python2.4/site-packages/bzrlib/transport/sftp.py line 127
  in send
/usr/lib/python2.4/site-packages/bzrlib/branch.py:613: UserWarning: branch BzrBranch('sftp://chinstrap.ubuntu.com/%2Fhome/warthogs/archives/bradb/launchpad/malone-initial-bug-contacts/') was not explicitly unlocked
  warn("branch %r was not explicitly unlocked" % self)
Exception exceptions.OSError: <exceptions.OSError instance at 0x31b71760> in <bound method BzrBranch.__del__ of BzrBranch('sftp://chinstrap.ubuntu.com/%2Fhome/warthogs/archives/bradb/launchpad/malone-initial-bug-contacts/')> ignored

I imagine this output to be quite difficult to read for someone who isn't a Python programmer (or even for somebody who is a Python programmer, but is much more interested in debugging their own error messages, rather than someone else's. :)

I would have preferred some simple output, like:

push operation cancelled.

When I tried the push again, I got this output:

bzr: WARNING: Unable to update the working tree of: sftp://chinstrap.ubuntu.com/%2Fhome/warthogs/archives/bradb/launchpad/malone-initial-bug-contacts/
bzr: ERROR: bzrlib.errors.LockError: File '.bzr/branch-lock' already locked
  at /usr/lib/python2.4/site-packages/bzrlib/transport/sftp.py line 196
  in __init__

I would have expected instead for the push to have resumed where it left off.