Processing `/home/lilydev/vc/gub/target/linux-x86/gubfiles/build/lilypond-hwn/input/regression/out-test/lily-c566edf0df.ly'
Parsing...
Renaming input to: `staff-tweak.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-c566edf0df.texidoc'...
Writing lily-c566edf0df-1.signature
Layout output to `lily-c566edf0df-1.eps'...
Layout output to `lily-c566edf0df.eps'...
Writing lily-c566edf0df-systems.texi...
Writing lily-c566edf0df-systems.tex...
Writing timing to lily-c566edf0df.profile...