Issue2176

It's trivial to reproduce this bug:

wget https://pypi.python.org/packages/source/P/PrettyTable/prettytable-0.7.2.tar.bz2#md5=760dc900590ac3c46736167e09fa463a

import tarfile

with tarfile.open(name='prettytable-0.7.2.tar.bz2', mode='r') as t:
    t.extractall()

will reliably produce output files with chunks of data missing, as can be readily be verified with diff -r

Note that using the bz2 module to decompress produces a valid tar, so there's likely some interaction between streaming decompress and output of a given block to the untarred directory.

bz2.BZ2File.read would not read all of the bytes requested. In particular, the tarfile module by default would request 16384 bytes at a time, but the read would return no more than 8192 bytes. Then the tarfile would seek forward, assuming it had read 16384 bytes, thereby missing chunks of files.

Fixed as of http://hg.python.org/jython/rev/91b39451dc89