convert-ly bug in 2.1.33/34 ?

[Matthias Neeracher]

I'm getting errors in convert-ly in 2.1.33 and 2.1.34:

Processing `Afterhours.ly' ... Applying conversions: 1.9.0, 1.9.1,  
1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6, 1.9.7, 1.9.8, 2.1.1, 2.1.2, 2.1.3,  
2.1.4, 2.1.7, 2.1.10, 2.1.11, 2.1.12, 2.1.13, 2.1.14, 2.1.15, 2.1.16,  
2.1.17, 2.1.18, 2.1.19, 2.1.20, 2.1.21, 2.1.22, 2.1.23, 2.1.24, 2.1.25,  
2.1.26, 2.1.27, 2.1.28, 2.1.29, 2.1.30, 2.1.31, 2.1.33, Traceback (most  
recent call last):
  File "/sw/bin/convert-ly", line 2171, in ?
    do_one_file (f)
  File "/sw/bin/convert-ly", line 2110, in do_one_file
    touched = do_conversion (infile, from_version, outfile, to_version)
  File "/sw/bin/convert-ly", line 2056, in do_conversion
    str = x[1] (str)
  File "/sw/bin/convert-ly", line 2027, in conv
    + "#\(make-vector 3 '\g<list>\)", str)
  File "/sw/lib/python2.3/sre.py", line 143, in sub
    return _compile(pattern, 0).sub(repl, string, count)
  File "/sw/lib/python2.3/sre.py", line 229, in _compile
    raise error, v # invalid expression
sre_constants.error: unbalanced parenthesis

The offending statement seems to be:

        str = re.sub  
(r"(\\set)\s+)?(?P<context>(Score\.)?)breakAlignOrder\s*=\s*#'(? 
P<list>[^\)]+)",
                      r"\n\\override \g<context>BreakAlignment  
#'break-align-orders = "
                      + "#(make-vector 3 '\g<list>)", str)

Which to my not very python-trained eye really seems to have a missing  
( at the beginning of the regexp. Inserting one caused the script to  
run without complaints, but I'm not 100% sure that was the right thing  
to do.

Matthias