Comment #143 on issue 2148 by [email protected]: vertical skylines should use stencil integrals
http://code.google.com/p/lilypond/issues/detail?id=2148
Mmh, I really should include the snippet-*.log files in the copied logs. An assertion failed while drawing systems, see http://grenouille.lilynet.net/patches-tests/2148/out/lybook-testdb/1b/lily-703d6aa3.log
