Something very weird's going on.
If I redo the definition of \bar "" in a ly-file with a not empty string, which
can be done with:
~~~
\version "2.21.0"
#(add-bar-glyph-print-procedure "x" (@@ (lily) make-empty-bar-line))
#(define-bar-line "x" "x" "x" #f)
<<
{ c'2 \bar "x" }
{ d'2. }
~~~
then all is fine.
Why?
But using an undefined BarLine will cause the bug:
~~~
<<
{ c'2 \bar "y" }
{ d'2. }
>>
~~~
Why?
And it doesn't fix Simon's example.
---
** [issues:#4084] Hidden BarLine during note yields programming error**
**Status:** Accepted
**Created:** Sat Aug 30, 2014 05:48 AM UTC by Anonymous
**Last Updated:** Mon Dec 03, 2018 06:19 PM UTC
**Owner:** nobody
*Originally created by:* *anonymous
*Originally created by:*
[[email protected]](http://code.google.com/u/106131861630194758622/)
Dan Eble wrote :
% programming error: Loose column does not have right side to attach to.
\version "2.18.0"
\language "english"
music = \relative c' \{
c4. c
\}
bars = \relative f \{
s2
\once \override Timing.BarLine.break-visibility = \#end-of-line-visible
\bar "."
\}
\score \{
\new Staff << \music \bars >>
\}
---
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