abc2ly get's lost

[Terry Therneau]

Here is a snippet of a barbershop arrangement that causes "Huh?" message from 
abc2ly:
  

%
% Wails
%
[V:1][K:A] e4-|e2 (_e>d)| c4-|c2 (e2| [K:Ab] e4-|e2) (=d>_d)| c4| 
[V:2][K:A] c4-|c2 (=c>B)| A4-|A2 (c2| [K:Ab] c4-|c2) (=B>_B)| A4|
           w:Oo,_ Oo,_ Oo,_ Oo,__ Oo,_ Oo.
[V:3][K:A] a>e f>e| a>e f>=f| e>e f>e| 
           w:Bum ba bum ba bum ba bum ba bum ba bum ba 
           f2 (=g2| [K:Ab] a)>e f>e| a>e f>_f|  e>e f>f|
           w:bum Oo,_ ba bum ba bum ba bum ba bum ba bum ba
[V:4] [K:A] A4-|A4-| A4-| A2 (A2| [K:Ab] A4-|A4-|A4) |
      w:Oo,___ Oo,___

1. I add extra indentation for clarity; abc2ly doesn't like the lines that have 
whitespace before a "w:".  Whether this is a bug or not can easily be argued.

2. After removing the white space we still have an error with the third line of 
the baritone part (V3).

I'm happy to send the entire abc file and/or postscript output if that is 
helpful.