hairpin length for one note

[Paul Scott]

2.9.2 (on Debian sid)


       6.5.3 Dynamics

A hairpin starts at the left edge of the beginning note and ends on the 
right edge of the ending note.

but f2\>\!

gives:
gotitbadnotes.ly:252:6: warning: can't find start of (de)crescendo
 f2\>
     \! r2 [8][16][24][32][40]

Shouldn't this just give a hairpin in the space horizontally allocated 
to the note?

It works if I put another note in between.

Paul Scott