\partial on multiple staves

[Gilles]

Hi.

%--- one.ly ---
\version "2.4.5"

one = \relative c'' {
    d2 d |
    \partial 2. e2 c4 |
}
%---

%--- two.ly ---
\version "2.4.5"

two = \relative c'' {
    d2 d |
    \partial 2. e2 c4 |
}
%---

These two (identical) snippets independently compile without warning,
as they should.

When they are combined into a score:

%--- all.ly ---
\include "one.ly"
\include "two.ly"

\score {
  \context StaffGroup <<
    \new Staff \one
    \new Staff \two
  >>
}
%---

the compilation spuriously complains:

GNU LilyPond 2.4.5
Processing `all.ly'
Parsing...
Interpreting music...
two.ly:4:9: warning: barcheck failed at: -3/4:
    d2 d
         |
[3]
Preprocessing graphical objects...
Calculating line breaks...
Layout output to `all.tex'...
Converting to `all.dvi'...
Converting to `all.ps'...
Converting to `all.pdf'...


Whereas the result is as expected (and there is no bar error).


Gilles