Processing `/home/lilydev/vc/gub/target/linux-x86/gubfiles/build/lilypond-hwn/input/regression/out-test/lily-17a0dcc77f.ly'
Parsing...
Renaming input to: `markup-stack.ly'
Interpreting music... 
Preprocessing graphical objects...
Calculating line breaks... 
programming error: Grob `System' has no interface for property `labels'
continuing, cross fingers
Drawing systems... 
Writing header field `texidoc' to `lily-17a0dcc77f.texidoc'...
Writing lily-17a0dcc77f-1.signature
Layout output to `lily-17a0dcc77f-1.eps'...
Layout output to `lily-17a0dcc77f.eps'...
Writing lily-17a0dcc77f-systems.texi...
Writing lily-17a0dcc77f-systems.tex...
Writing timing to lily-17a0dcc77f.profile...