Spacer notes and (de)crescendo

[Alard de Boer]

Hello list,

When using spacer notes to move the start of a descrescendo,
I found the following:

\version "2.7.18"
\score {
    \new Staff {
%        s1*0
        << c'1 { s2 s2-\> } >> | c'4-\! r4 r2 |
        << c'1 { s2 s2-\> } >> | c'4-\! r4 r2 |
    }
}

The first decrescendo is not visible in the output, and there
are warnings (can't find start of (de)crescendo, unterminated
(de)crescendo). The second descrescendo is fine.

If I insert an empty spacer note (the s1*0) the problem
disappears. This behaviour seems to happen right after an
opening brace, not in other places.

Alard.