grace notes after repeat bar

[Lewis Overton]

I'm running Lilypond 12 on a Mac, using an external editor (TextMate), which generally works
quite well. But I play trombone, and must create parts and scores involving sliding into
notes. Lilypond produces some bizarre output. The example below illustrates the ugly output my
innocence led me into when I print a score. (Print the first example to see.)

The lilypond docs address this under grace notes.

Grace note synchronization can also lead to surprises. Staff notation, such as key signatures,
bar lines, etc., are also synchronized. Take care when you mix staves with grace notes and
staves without, for example,

\relative c'' {
<< \new Staff { e4 \bar "|:" \grace c16 d4 }
   \new Staff { c4 \bar "|:"  d4 } >>
}

The "solution" is to include skips in all other parts, for example:

\relative c'' {
<< \new Staff { e4 \bar "|:" \grace c16 d4 }
   \new Staff { c4 \bar "|:" \grace s16 d4 } >>
}

This seems a little less than ideal (read "I consider it a bug"). One must alter one part to
accommodate characteristics of another part. Is there a way to avoid this problem which doesn't
involve putting stuff into a part which (arguably, I guess) isn't really present in that part?

A scoop might do the job, but isn't defined in Lilypond. I've seen them presented, though, and
will go searching for how to draw them if that's the answer. 

Lewy