[New-bugs-announce] [issue39039] zlib.error with tarfile.open

[jvoisin]

New submission from jvoisin <jvoisin at google.com>:

The attached file produces the following stacktrace when opened via `tarfile.open`, on Python 3.7.5rc1:

```
$ cat test.py 
import sys
import tarfile

tarfile.open(sys.argv[1])
$ python3 test.py ./crash-c10c9839d987fa0df6912cb4084f43f3ce08ca82
Traceback (most recent call last):
  File "test.py", line 4, in <module>
    tarfile.open(sys.argv[1])
  File "/usr/lib/python3.7/tarfile.py", line 1573, in open
    return func(name, "r", fileobj, **kwargs)
  File "/usr/lib/python3.7/tarfile.py", line 1645, in gzopen
    t = cls.taropen(name, mode, fileobj, **kwargs)
  File "/usr/lib/python3.7/tarfile.py", line 1621, in taropen
    return cls(name, mode, fileobj, **kwargs)
  File "/usr/lib/python3.7/tarfile.py", line 1484, in __init__
    self.firstmember = self.next()
  File "/usr/lib/python3.7/tarfile.py", line 2289, in next
    tarinfo = self.tarinfo.fromtarfile(self)
  File "/usr/lib/python3.7/tarfile.py", line 1094, in fromtarfile
    buf = tarfile.fileobj.read(BLOCKSIZE)
  File "/usr/lib/python3.7/gzip.py", line 276, in read
    return self._buffer.read(size)
  File "/usr/lib/python3.7/_compression.py", line 68, in readinto
    data = self.read(len(byte_view))
  File "/usr/lib/python3.7/gzip.py", line 471, in read
    uncompress = self._decompressor.decompress(buf, size)
zlib.error: Error -3 while decompressing data: invalid distances se
```

----------
components: Library (Lib)
files: crash-c10c9839d987fa0df6912cb4084f43f3ce08ca82
messages: 358337
nosy: jvoisin
priority: normal
severity: normal
status: open
title: zlib.error with tarfile.open
type: behavior
versions: Python 3.7
Added file: https://bugs.python.org/file48774/crash-c10c9839d987fa0df6912cb4084f43f3ce08ca82

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39039>
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