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(gz) Make lazy imports proxy by default so that concurrent resolution is
 robust (Martin Packman)

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bzrlib/builtins.py
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import bzrlib.bzrdir
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
 
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from bzrlib import lazy_import
 
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lazy_import.lazy_import(globals(), """
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import cStringIO
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import errno
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import sys
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            load_list=None, debugflag=None, starting_with=None, subunit=False,
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            parallel=None, lsprof_tests=False,
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            sync=False):
 
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        # During selftest, disallow proxying, as it can cause severe
 
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        # performance penalties and is only needed for thread
 
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        # safety. The selftest command is assumed to not use threads
 
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        # too heavily. The call should be as early as possible, as
 
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        # error reporting for past duplicate imports won't have useful
 
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        # backtraces.
 
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        lazy_import.disallow_proxying()
 
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        from bzrlib import tests
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        if testspecs_list is not None: