Chris AtLee <ch...@atlee.ca> added the comment:
It's caused by the combination of the symlink existing, and having the tarfile
opened in r| mode.
If I run the attached test file in a fresh directory, I get the following
exception:
raceback (most recent call last):
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2227, in makelink
os.symlink(tarinfo.linkname, targetpath)
FileExistsError: [Errno 17] File exists: 'message.txt' -> './symlink.txt'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "../test.py", line 12, in <module>
tf.extractall()
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2024, in extractall
self.extract(tarinfo, path, set_attrs=not tarinfo.isdir(),
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2065, in extract
self._extract_member(tarinfo, os.path.join(path, tarinfo.name),
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2145, in _extract_member
self.makelink(tarinfo, targetpath)
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2237, in makelink
self._extract_member(self._find_link_target(tarinfo),
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2137, in _extract_member
self.makefile(tarinfo, targetpath)
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line
2176, in makefile
source.seek(tarinfo.offset_data)
File "/home/catlee/.pyenv/versions/3.8.2/lib/python3.8/tarfile.py", line 513,
in seek
raise StreamError("seeking backwards is not allowed")
tarfile.StreamError: seeking backwards is not allowed
----------
Added file: https://bugs.python.org/file49168/test.py
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<https://bugs.python.org/issue12800>
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