Contemporary glissando breaks bar-checking

[Michael Hendry]

I’ve returned to a file I created under version 2.14.0, in which I used the 
zigzag glissando technique recommended in the online manual.

As far as I can remember, this worked well, but now I’ve returned to this file 
to make some adjustments, and I get bar-check warnings and unsatisfactory 
layout.

The following minimal example should demonstrate the problem:


\version "2.18.2"
\relative c'' { \time 3/4 \override Glissando.style = #'zigzag c4 c \cadenzaOn 
c4\glissando \hideNotes c,,4 \unHideNotes \cadenzaOff \bar "|" 
| a'' b c
}



Any suggestions? 

Michael