New submission from Gregory P. Smith:
$ cat >test.py <<EOF
import tarfile
import sys
with tarfile.open(sys.argv[1], mode="r|*") as f:
while True:
info = f.next()
if not info:
break
EOF
$ tar cf test.tar -T /dev/null
$ python2.7 test.py test.tar
Traceback (most recent call last):
File "test.py", line 6, in <module>
info = f.next()
File "/usr/lib/python2.7/tarfile.py", line 2319, in next
self.fileobj.seek(self.offset)
File "/usr/lib/python2.7/tarfile.py", line 555, in seek
raise StreamError("seeking backwards is not allowed")
tarfile.StreamError: seeking backwards is not allowed
$ python3.4 test.py test.tar
Traceback (most recent call last):
File "test.py", line 6, in <module>
info = f.next()
File "/usr/lib/python3.4/tarfile.py", line 2244, in next
self.fileobj.seek(self.offset)
File "/usr/lib/python3.4/tarfile.py", line 518, in seek
raise StreamError("seeking backwards is not allowed")
tarfile.StreamError: seeking backwards is not allowed
I have reconfirmed that the above still happens using a top of tree 2.7.9+
build.
----------
components: Library (Lib)
messages: 232675
nosy: gregory.p.smith
priority: normal
severity: normal
stage: needs patch
status: open
title: tarfile raises an exception when reading an empty tar in streaming mode
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23056>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
