Am 01.10.2016 um 18:39 schrieb Paul:
Thanks for the bug report. I posted a comment on the issue here:
https://sourceforge.net/p/testlilyissues/issues/4979/#b111
This comment says:
When two ledger lines are at the same vertical position, in the same
note column, (as I assume is probably the case with a pitched trill
note?) we apparently can't just assume that they overlap horizontally
(as is most often the case with chords). We will have to check
whether they overlap horizontally or not before merging them.
There are other cases where notes in the same note column are
horizontally far away from each other, see f. e.
http://lsr.di.unimi.it/LSR/Item?id=505 so this is not a
pitchedTrill-only problem ;)