Related to the BUG #23752 and BUG #23681 I found a workaround. The problem seems to be related with the environement variables. So I wrote an alternative svn script (in /home/svn) with the following content:

#!/bin/sh
exec env -i /usr/bin/svn.real “$@”

Then moved the original script and copied my script in its place with the following commands:

mv /usr/bin/svn /usr/bin/svn.real cp /home/svn /usr/bin/svn chmod a+x /usr/bin/svn

And now it is possible to access the svn repository. This may be helpful for everyone encountring the same problem with the current Docker image 6.0.

Best regards,
Faycal