Re: Issue 1723 in lilypond: beam fails to extend over rest, intermittently

[lilypond]

Comment #8 on issue 1723 by address@hidden: beam fails to extend over rest,  
intermittently
http://code.google.com/p/lilypond/issues/detail?id=1723

Ok, some sleuthing.  The last example I posted is actually quite  
instructive.  It shows that it is hit&miss for every single occurence: the  
left side has some beamings right where the right side hasn't, and vice  
versa.

The long slanted beam over multiple rests also is instructive (posted in  
some other report, but I fail to find the issue): the rests get staggered,  
so there is collision avoidance going on, and _if_ the beam is too short,  
it ends at the last stem, not reaching over _any_ of the rests.

Also the problem seems to appear exclusively at the _end_ of beams.  If  
adding stemlets fixes it, it would seem to be an interaction between  
non-stems and beaming.