Crash with bare duration at the start of a Voice-alias context

[Simon Albrecht]

Hello list,

this causes a crash while Interpreting music (Exiting with return code 11.):

%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% also happens with 2.20.0
\version "2.23.6"
%%{
% also happens with VaticanaVoice,MedicaeaVoice,PetrucciVoice
\new MensuralVoice {
  % this prevents the crash
  %c'1
  1
}
%}
% none of these cause the crash
%{
\new Voice \with {
  \remove Ligature_bracket_engraver
  \consists Mensural_ligature_engraver
  \override NoteHead.style = #'mensural
  autoBeaming = ##f
} { 1 }
%}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Best, Simon