MIDI files overwritten in Lily 2.4.5

[Chris Sawer]

Hi,

Using LilyPond 2.4.5 on Mac OS X, the following score results in the 
MIDI file for the second score overwriting the MIDI file for the first 
score ("-1" is not appended any more). The paper output is as expected. 
I don't know how long this has been a problem for, or whether the 
behaviour is the same in recent 2.5 versions.

Regards,

Chris


\version "2.4.5"

\score {
 \new Staff { a4 b c' d' }
 \layout {}
 \midi {}
}

\score {
 \new Staff { e'4 f' g' a' }
 \layout {}
 \midi {}
}