error exporting a knitpack-experimental branch

[Alexander Belchenko]

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Not only 'export' command broken, but 'cat' too.
'export' was fixed in bzr.dev revno 2966.

Here the patch:

=== modified file 'bzrlib/export/__init__.py'
- --- bzrlib/export/__init__.py 21.09.2006 2:43:18
+++ bzrlib/export/__init__.py 28.10.2007 19:30:25
@@ -92,7 +92,11 @@

     if format not in _exporters:
         raise errors.NoSuchExportFormat(format)
- -    return _exporters[format](tree, dest, root)
+    tree.lock_read()
+    try:
+        return _exporters[format](tree, dest, root)
+    finally:
+        tree.unlock()


 def get_root_name(dest):

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iD8DBQFHP0iszYr338mxwCURAkSPAJ91yimZfcsLHVE8/1lyDQ83+1Ht1gCeM9yM
DMIzo19g7y/kXkj/eC559sg=
=VfeW
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