How do I solve this error while attempting an SVN export using pysvn?

Question

I am attempting to use the Python SVN bindings (pysvn) to do an export on a repository and am encountering the following error:

python: subversion/libsvn_subr/dirent_uri.c:955: svn_dirent_join: Assertion `svn_dirent_is_canonical(base, pool)' failed.
Aborted (core dumped)

The example code is:

import pysvn
client = pysvn.Client()
uri = 'https://svn.mycompany.com/myproject/trunk/'
# This works fine
print client.list(uri)
# This crashes with the above error
r = client.export(uri, './temp', force=True)

However, doing a svn export --force https://svn.mycompany.com/myproject/trunk/ from a shell prompt works without issue.

I'm using:

Python 2.7.3
Subversion 1.7.5
CentOS 6.0 x64

Any ideas, please?

What if you try with absolute path instead of ./temp? subversion/libsvn_subr/dirent_uri.c:955 line is assert(svn_dirent_is_canonical(base, pool)); so the problem is with path format — Dmitry Pavlenko
– Dmitry Pavlenko, Commented Jul 24, 2012 at 9:08

Ivan Zhakov · Accepted Answer · 2012-07-24 19:16:52Z

3

Subversion API uses canonical URL and paths internally. You URL have trailing slash and this is not canonical URL. Remove trailing slash or use svn_uri_canonicalize() function to canonicalize URL before calling Subversion API functions.

You can find more details in Subversion API documentation: http://subversion.apache.org/docs/api/latest/svn_dirent_uri_8h.html

answered Jul 24, 2012 at 19:16

Ivan Zhakov

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1 Comment

oliver Over a year ago

Thanks for the great hint! In my case I had used --config-dir option with a path that ended with a slash, and that slash caused the assertion failure.

jamieb · Accepted Answer · 2012-07-24 05:26:27Z

1

I tried using the svn+ssh:// scheme and got the same error. This lead me to believe that the assertion failure might not actually be related to the repo URI. On a whim, I changed the export directory to /tmp/ and everything worked fine. The directory I was trying to use previously (./temp) exists in my home directory which is on an NFS mount with the "root squash" option enabled. This has been known to cause odd application issues before.

answered Jul 24, 2012 at 5:26

jamieb

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