[issue29760] tarfile chokes on reading .tar file with no entries (but does fine if the same file is bzip2'ed)

[Matt Bogosian]

Matt Bogosian added the comment:

FWIW, the (offending) fix for #24259 was introduced (e.g., in 2.7) via 2.7.10. I've verified that 2.7.9 works as expected:

```
$ python -V
Python 2.7.9
$ python tarfail.py
opening /…/tarfail/test.tar.bz2
opening /…/tarfail/test.tar
.
----------------------------------------------------------------------
Ran 1 test in 0.010s

OK
```

So this should probably be considered a regression.

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<http://bugs.python.org/issue29760>
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