c' d e f |
\repeat semi 2 { g a b c }
\alternative { { c b a g a g a g} { f e d c } } \break
-c, d e f | % Assertion failure if this line is removed!!
+%c, d e f | % Assertion failure if this line is removed!!
\repeat semi 2 { g a b c }
\alternative { { c b a g \break a g a g} { f e d c } } \break
c, d e f |