After importing a project that does not use the default SVN permission (and redefine a [/] section), the generated SVN access file is like:

# BEGIN CODENDI DEFAULT SETTINGS - DO NOT REMOVE
[groups]

[/]
* =
@members = rw
# END CODENDI DEFAULT SETTINGS
[/]
* = 
@members = r

Which is not a valid file.

Here, the source project has deactivated the Use default permissions option to replace permissions by the custom definition:

[/]
* = 
@members = r

Steps to reproduce:

As a project administrator,

1. On a project using an SVN repository, goto the SVN repository 'Access control' tab
2. Uncheck the option 'Use default permissions'
3. Set new custom permissions
4. Save a new version of the permission

As a site admin,

1. Export this project using src/utils/php-launcher.sh src/utils/export_project_xml.php
2. Import this archive on a new instance using tuleap import-project-xml
3. Check the content of the file /var/lib/tuleap/svn_plugin/<project_id>/<repo_name>/.SVNAccessFile

Note: The file src/common/xml/resources/project/svn-definition.rng does not seem to support the option 'Default permissions'.