Full bar tremolo with accidentals fails

[Marcos da Silva Sampaio]

Hello,

I'm using a tremolo in a full bar. I used the code below, but it fails
and I got this error message:

Drawing systems...lilypond: ../flower/include/drul-array.hh:35: T&
Drul_array<T>::at(Direction) [with T = double]: Assertion `d == 1 || d
== -1' failed.


{ \repeat tremolo 16 { ees32 a } }

There is no problem without the accidental:

{ \repeat tremolo 16 { e32 a } }


Lilypond fails in the same way when I use cautionary accidentals also:

{ \repeat tremolo 16 { e32 a! } }


Am I doing anything wrong?
-- 
Marcos da Silva Sampaio

Professor de Teoria, Composição e Computação Musical
Universidade Federal da Bahia / Escola de Música

http://marcosdisilva.net
http://genosmus.com