New submission from Jan Schatz <jan.sch...@hms-networks.com>:

I have a tar gz archive that fails to be extracted via tarfile.extractall(). By 
adding some debug code I found that at some point InvalidHeaderError is raised 
inside tarfile.next(). But the function just swallows the exception, because 
the offset isn't 0 (see 
https://github.com/python/cpython/blob/5368c2b6e23660cbce7e38dc68f859c66ac349ee/Lib/tarfile.py#L2334).
 Why does the function behave like this? I would expect an except rather than 
silently stopping extraction if the archive is damaged.

----------
components: Library (Lib)
messages: 378934
nosy: jan.schatz
priority: normal
severity: normal
status: open
title: Why does tarfile.next swallow InvalidHeaderError
type: behavior
versions: Python 3.7

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42079>
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