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[3.9] bpo-39039: tarfile raises descriptive exception from zlib.error (GH-27766)#28614

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Sep 29, 2021
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[3.9] bpo-39039: tarfile raises descriptive exception from zlib.error (GH-27766)#28614
ambv merged 1 commit into
python:3.9from
ambv:backport-b6fe857-3.9

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@ambv

@ambv ambv commented Sep 29, 2021

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  • during tarfile parsing, a zlib error indicates invalid data
  • tarfile.open now raises a descriptive exception from the zlib error
  • this makes it clear to the user that they may be trying to open a
    corrupted tar file.
    (cherry picked from commit b6fe857)

Note: since BPO-39717 wasn't backported to 3.9, this backport PR doesn't use from None in the new raise statement either.

Co-authored-by: Jack DeVries 58614260+jdevries3133@users.noreply.github.com

https://bugs.python.org/issue39039

…pythonGH-27766)

* during tarfile parsing, a zlib error indicates invalid data
* tarfile.open now raises a descriptive exception from the zlib error
* this makes it clear to the user that they may be trying to open a
  corrupted tar file.
(cherry picked from commit b6fe857)

Co-authored-by: Jack DeVries <58614260+jdevries3133@users.noreply.github.com>
Comment thread Lib/tarfile.py
try:
import zlib
if isinstance(e, zlib.error):
raise ReadError(f'zlib error: {e}')

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Shouldn't this have from e at the end?

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Please read the description of the backport.

@ambv ambv merged commit 7bff4d3 into python:3.9 Sep 29, 2021
@ambv ambv deleted the backport-b6fe857-3.9 branch September 29, 2021 10:56
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5 participants