For some branches appear the next messages, which seems for me totally unrelated...
There were 2 failures:
1) Tar_TestCase::test_createdynamic
Path in TAR
Failed asserting that false is true.
/var/www/test/.genci/works/dokuwiki/builds/fetchimagetokexternal/build/0/work/_test/tests/inc/tar.test.php:27
2) Tar_TestCase::test_createfile
Path in TAR
Failed asserting that false is true.
/var/www/test/.genci/works/dokuwiki/builds/fetchimagetokexternal/build/0/work/_test/tests/inc/tar.test.php:60
FAILURES!
Tests: 534, Assertions: 24573, Failures: 2.
See for example:
http://test.dokuwiki.org/fetchimagetokexternal.html