Index: subversion/libsvn_repos/fs-wrap.c =================================================================== --- subversion/libsvn_repos/fs-wrap.c (revision 1494892) +++ subversion/libsvn_repos/fs-wrap.c (working copy) @@ -331,7 +331,12 @@ char action; apr_hash_t *hooks_env; - SVN_ERR(svn_repos__validate_prop(name, new_value, pool)); + /* We should validate properties only for additions and + modifications. NEW_VALUE exists in both these cases. */ + if (new_value) + { + SVN_ERR(svn_repos__validate_prop(name, new_value, pool)); + } /* Fetch OLD_VALUE for svn_fs_change_rev_prop2(). */ if (old_value_p)