another test case failure with this patch:
https://launchpad.net/ubuntu/+archive/test-rebuild-20130329/+build/4416983

reproducible with feedparser 5.1.3 from pypi, on x86 (but not x86_64).

ERROR: test_gzip_struct_error (__main__.TestCompression)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./feedparsertest.py", line 433, in test_gzip_struct_error
    f = feedparser.parse('http://localhost:8097/tests/compression/gzip-struct-error.gz')
  File "/build/buildd/feedparser-5.1.2/feedparser/feedparser.py", line 3836, in parse
    data = gzip.GzipFile(fileobj=_StringIO(data)).read()
  File "/usr/lib/python2.7/gzip.py", line 253, in read
    while self._read(readsize):
  File "/usr/lib/python2.7/gzip.py", line 323, in _read
    self._read_eof()
  File "/usr/lib/python2.7/gzip.py", line 340, in _read_eof
    crc32, isize = struct.unpack("<II", self._read_exact(8))
  File "/usr/lib/python2.7/gzip.py", line 189, in _read_exact
    raise EOFError("Compressed file ended before the "
EOFError: Compressed file ended before the end-of-stream marker was reached

----------------------------------------------------------------------
Ran 4237 tests in 5.190s

FAILED (errors=1)
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 43939)