Partial measure alignment at end of score

[Ben Finney]

Howdy all,

I'm writing a score that has a partial measure at the beginning and at
the end. LilyPond is complaining that the measure at the end fails its
bar check.

The source file is available at <URL:http://dpaste.org/OeUJ/> for a few
weeks.

The output from LilyPond is:

=====
$ lilypond "The Walloping Window Blind.ly" 
GNU LilyPond 2.12.3
Processing `The Walloping Window Blind.ly'
Parsing...
Interpreting music... [8][16]
The Walloping Window Blind.ly:68:36: warning: barcheck failed at: -1/2
            been "in his" bunk be-  
                                    |
The Walloping Window Blind.ly:90:36: warning: barcheck failed at: -1/2
            teeth "of a" boom- ing  
                                    |
The Walloping Window Blind.ly:112:32: warning: barcheck failed at: -1/2
            up with sug-ar and  
                                |
The Walloping Window Blind.ly:134:37: warning: barcheck failed at: -1/2
            dipped "in the" shin- y  
                                     |
The Walloping Window Blind.ly:156:36: warning: barcheck failed at: -1/2
            bark "of the" Rug- bug  
                                    |
The Walloping Window Blind.ly:183:51: warning: barcheck failed at: -1/2
                r4 <c' ees' aes'> r <bes d' aes'>  
                                                   |
The Walloping Window Blind.ly:210:48: warning: barcheck failed at: -1/2
                <aes,, aes,>4 r <bes,, bes,> r  
                                                |
programming error: Moment is not increasing. Aborting interpretation.
continuing, cross fingers
…
=====

Why is the bar check failing, when the measure is clearly marked as the
right length (“\partial 2 …”)? How can I get that partial measure to
work in all the places its used?

-- 
 \        “[R]ightful liberty is unobstructed action, according to our |
  `\        will, within limits drawn around us by the equal rights of |
_o__)                                 others.” —Thomas Jefferson, 1819 |
Ben Finney